View AN463_4597791.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MOTOROLA
Order this document as AN463/D
SEMICONDUCTOR
APPLICATION NOTE
AN463
68HC05K0 Infra-red Remote Control
Tony Breslin, MCU Applications Group, Motorola Ltd., East Kilbride, Scotland The MC68HC05K0 is a low cost, low pin count single chip microcomputer with 504 bytes of user ROM and 32 bytes of RAM. The MC68HC05K0 is a member of the 68HC05K series of devices which are available in 16-pin DIL or SOIC packages. It uses the same CPU as the other devices in the 68HC05 family and has the same instructions and registers. Additionally, the device has a 15-stage multi-function timer and 10 general purpose bi-directional I/0 lines. A mask option is available for software programmable pull-downs on all of the I/O pins and four of the pins are capable of generating interrupts. The device is ideally suited for remote-control keyboard applications because the pull-downs and the interrupt drivers on the port pins allow keyboards to be built without any external components except the keys themselves. There is no need for external pull-up or pull-down resistors, or diodes for wired-OR interrupts, as these features are already designed into the device. This application makes use of many of the device features to control an infra-red television remote control. The application could be very easily modified to control any device with a similar transmission protocol. It will run on any of the `K' devices without modification. When a key on the remote control keypad is pressed, the micro controller must first determine what key is being pressed and generate an individual code for the key. The key code is then converted to a instruction code that is inserted into the transmission command which, using a defined protocol, is transmitted to the television receiver. The command is continually transmitted as long as the key is being held down. As the remote control is battery powered it needs to use as little power as possible. This is achieved by entering STOP mode when no keys are being pressed and effectively switches off the device. The micro controller comes out of STOP mode upon receipt of an interrupt request that is generated when a key is pressed.
Remote Control Keyboard
The 68HC05K0 has ten general purpose I/O pins. One of these is used for the transmission signal output leaving nine pins for the keyboard control. Of these, four pins on PortA have internal interrupt request hardware. Using these four pins as inputs allows key presses to be detected without any external interrupt hardware. This leaves the five remaining pins for outputs. Using the internal pull-down facility and the rising edge interrupt request on the four inputs permits interrupts to be generated. If the five outputs are set to logic `1', so driving an input from logic `0' to logic `1' when a key is pressed, an interrupt request can be generated. Using this arrangement a five by four keyboard matrix can be used. An extra four keys can be controlled if the Vdd line is used to drive one row of four keys to logic `1'. Therefore the maximum amount of keys controllable becomes twenty four.
Remote Control Specifications
The basic purpose of a television remote control is to transmit a control instruction to the television. The instruction is generated by a keystroke on the remote control keyboard. The detection and decoding of a key press and the transmission encoding is carried out by the remote control micro controller.
(c) MOTOROLA LTD., 1992
!MOTOROLA
1 4 7 0
TV/ TEXT
2 5 8
PC+ MIX
3 6 9
PCTIME
NORM MUTE VOL+ VOLCON+ CON-
VDD A7 A6 A5 A4 B0
31 11 71 14 b1 17 d1 10 e1 39 f1 3e 3d 3b 2c 18 15 12
32 13 72 16 b2 19 d2 2d e2 3a f2 3c
34 00 74 01 b4 06 d4 07 e4 0c f4 0d
38 78 b8 d8 e8 f8
STOP SUB- INDEX PAGE
A0
A1
A2
A3
Figure 1 Keyboard layout with associated scanned and transmitted codes
A depressed key will set one of the input columns to logic `1'. By scanning the columns, and setting each row output to logic `0' and then checking if the inputs all become logic `0', the associated row for the key can be determined. If rotating the logic `0' through the five output pins fails to identify a key column, then the key must be connected to the Vdd line. This process gives an individual code for each key which is a combination of the code from the column inputs and the row outputs. This can then be decoded to an instruction that is inserted into the output signal for transmission. Figure 1 shows the layout of the keyboard on the left and the scanned and transmitted codes on the right. The keyboard layout incorporates the various television controls plus controls for TELETEXT. On the left hand side the codes returned from scanning the keyboard are shown in the upper right-hand corner of each key and the code sent for transmission for that key instruction are shown in the bottom left-hand corner. The I/O pins for each row and column are also shown for each key.
Transmission Protocol
The transmission protocol in this application is that used by the MC144105 IR Remote Control Transmitter. It uses a binary coded 9-bit data word with the LSB being transmitted first. Each bit of the transmitted signal is in the form of a bi-phase pulse code modulated (PCM) signal, whose bit coding is shown in Figure 2. For a transmitted `0' there is a 512s pause followed by a 32kHz pulse train for 512s. For a transmitted `1' there is 32kHz pulse train followed by a 512s pause. This gives a bit time of 1024s for all bits.This is shown asFigure 2.
bit-n
'0' 1024s 512s
'1'
Figure 2 Bit coding of PCM signal
MOTOROLA 2
AN463/D
A complete transmission command consists of several messages. Each command begins with a start message of nine 1's followed by the message appropriate to the key pressed. This message is repeatedly transmitted until the key is released. The transmission is terminated after the key is released by a end message of nine 1's. Every message consists of a pre-bit, a pre-bit pause, a start bit and nine data bits. The pre-bit and the start-bit are always logical `1'. The pre-bit allows for the set up of the automatic gain control in the receiving preamplifier. Figure 3 gives the exact timing relationships for the transmissions.
The command timing in Figure 3 shows that after the start transmission the message is continually re-transmitted at intervals of 131ms (approximately 8Hz) until the key is released. This is shown as time (c). The control timing shows the nine bit instruction 111001110 being transmitted starting with the LSB. The pre-bit pause is equal to two bit periods and is followed by a start-bit of logical `1'. The pulse train is continuous during the transition between transmitting a logic `0' and a logic `1'. The modulating pulse train has a frequency of approximately 32kHz with a mark-to-space ratio of one to three. The signal for transmission is output through one port pin and is used to drive an IR diode amplifier circuit.
(a) (b) (b)
(c)
(c)
COMMAND TIMING
START TRANSMISSION
MESSAGE TIMING
(1) (d) (f)
(1) (d) (e)
(0) (d) (e)
(1)
(1)
(1)
(0)
(0)
(1)
(1)
(1)
MODULATION
(g)
(g)
(h) (i)
Command timing
(a) = 32.8ms (b) = 13.3ms (c) = 131ms (d) = 512s (e) = 1.024ms (f) = 3.072ms (g) = 8s (h) = 32s (i) = 512s
start transmission start command control transmission (half-bit time) (bit time) (pre-pulse time) (1/fcarrier) (half-bit time)
13 * bit time
Message timing
16/fcarrier
Modulation
16/fcarrier
Figure 3 Circuit timing
AN463/D
MOTOROLA 3
Remote Control Operation
Figure 4 is a flow diagram showing the operation of the remote control on power-up or reset. After the initial set-up of the ports as inputs or outputs the remote control goes into STOP mode. It will remain in STOP mode as long as the device is not reset or a key is not pressed. When a key is pressed an interrupt request is generated. A short time delay makes sure that it is a true key press and not noise and also allows time for any switching effects on the inputs to pass prior to checking the inputs. The keyboard is then read to find which key has been pressed and the code for the key is decoded into an instruction and transmitted to the television. If the key is held down the instruction is re-transmitted until the key is released. This is useful for the instructions which count through the television channels or adjust the volume, colour or brightness controls. When the key is released a terminating instruction is sent to the receiver to inform it that the next message received is a separate instruction. This is useful in the case of a one time instruction like sending a channel number. In this example the receiver will tune to a channel only once; to tune to another channel the key must be released and a new instruction sequence received. After terminating the transmission the ports are reset ready for the next key press and the processor returns to the STOP mode.
setup ports for keybrd
STOP
interrupt
key pressed YES read keybrd
NO
decode send start command
send message
key still pressed NO send end message
YES
Figure 4 Flow diagram
MOTOROLA 4
AN463/D
Hardware
The remote control circuit is shown in Figure 5. The hardware consists of the keyboard, the oscillator and the infra-red amplifier. The oscillator can be a crystal or a ceramic resonator with a frequency of 2MHz. The oscillator frequency is important since the transmission timing is based around a 1MHz internal clock frequency. The infra-red amplifier uses two transistors and two standard diodes to limit the current through the IR diodes to approximately 1A. There is a need for a large capacitor close to the IR diodes because of the high switching current of the circuit.
5v 5v
RESET PB1 OSC1 OSC2 220pF PB0 IRQ PA0 PA1 PA2 PA3 VSS VDD PA7 PA6 PA5 PA4
2*IN4148
2MHz
10M
220pF
IR DIODES 0.47 MOTOROLA 5 47 8k2
GND
Figure 5 Infra-red remote control
AN463/D
470F
68HC05K0
Software
The listing of the remote control assembler code is contained at the end of this application note. The first section of the listing sets up the ports prior to going into STOP mode and waiting for a key to be pressed. PortA bits 0-3 are set up as inputs with the pull-downs enabled. Bits 4-7 are set up as outputs logic `1' as is PortB bit 0. PortB bit 1 is set-up as output logic `0' to switch off the IR amplifier before going into STOP mode. The next section of code named `presd' is the routine pointed to by the interrupt vector and is entered when a key is pressed. This routine first calls the keyboard scanning routine to determine which key has been pressed. It then calls the decoding routine to convert the code from the keyboard to a code that will be accepted by the television. The start message is then transmitted and is followed by the instruction message. There is then a check to see if the same key is still being pressed. If it is then the instruction message is re-transmitted until the key is released and the end message is transmitted. As the transmission protocol requires nine data bits and only one byte instructions are being decoded a flag has to be set for the ninth bit of the transmission routine. For the start and end transmissions this flag is set to 1 to give the nine 1's message. For all instructions the ninth bit is 0 so the flag is cleared. The decoding routine compares the code from the keyboard scan routine with data array `keydat'. On a match it takes the corresponding element from the array `tvdat' as the instruction code for transmission. The values of the instruction codes shown in the right-hand side of Figure 1 are specific for the receiver application. Each receiver using the same communications protocol will receive the same nine bit instruction but what the instruction does is dependent upon the receiver software. In this example the eight bit instruction `14' changes the channel to number four. In another receiver application the receiver may interpret the instruction code `14' as increase volume. The transmission routine is entered with the instruction for transmission in `keyst3'. After the pre-bit and the start-bit are transmitted the instruction byte is rotated (LSB first) into the carry flag. A logic `1' is sent for transmission if the flag is set after rotation and a logic `0' is sent for transmission if the flag is cleared. Each bit is transmitted as shown in Figure 1. The routines `send0' and `send1' send a pause of 512s followed by a 32kHz pulse train for 512s and a 32kHz pulse train for 512s followed by a 512s pause respectively. In the situation when a `1' follows a `0' then a pulse train of 1024s is required. To avoid breaks in this pulse train the `send0' routine checks the next bit to be transmitted to see if a double length pulse train must be transmitted. The `send1' routine then has to check that a double length pulse train has not been sent in the previous one and a half bit periods before sending a pulse train. The routine `burst' produces the 32kHz pulse train for a duration set by a count in the accumulator. As the instruction time for setting the PortB bit 1 pin high or low is five clock cycles then the minimum processor clock period is derived by dividing the minimum output state time, which is 8s when the output is high, by the minimum number of clock cycles to change this state. This gives an internal clock period of 8s/5 equalling 1.6s. Adding a three cycle delay will require an internal clock period of 8s/8 = 1s, allowing a 2MHz oscillator to be used. The code size is approximately 300 bytes, leaving memory space for more features to be added to the controller.
MOTOROLA 6
AN463/D
Debug
On applying power to the circuit the RESET vector will initialise the program counter at the beginning of the software. When examining the output at PortB bit 1 with an oscilloscope or logic analyser it should be noted that when trying to capture the signal by pressing a key the first signal out will be the start message of nine 1's. To capture the instruction the key should be held down and as the instruction will be continually re-transmitted then the capture can be initiated at this point.
AN463/D
MOTOROLA 7
Listing
0026 0027 0028 0029 0030 0031 0032 0033 0034 0035 0036 0037 0038 0039 0040 0041 0042 0043 0044 0045 0046 0047 0048 0049 0050 0051 0052 0053 0054 0055 0056 0057 0058 0059 0060 0061 0062 0063 0064 0065 0066 0067 0068 0069 0070 0071 0072 0073 0074 0075 0076 0077
*************************************************************** * INFRA RED REMOTE CONTROL FOR K0,K1 * *************************************************************** * WRITTEN BY A.BRESLIN 13.1.92 * *************************************************************** * THIS PROGRAM READS AND ENCODES A KEY FROM A 24 KEY KEYBOARD * * TO A FORM OF BIPHASE PULSE CODE MODULATION (PCM) FOR INFRA * * RED TRANSMISSION. IT USES THE TRANSMISSION PROTOCOL OF THE * * MC144105 IR REMOTE CONTROL TRANSMITTER * ***************************************************************
0000 0001 0004 0005 0008 0010 00e0 00e0 00e1 00e2 00e3
porta portb ddra ddrb tcsr papd
equ equ equ equ equ equ org
00 01 04 05 $08 $10 $e0 1 1 1 1 ; ; ; ; initial code from keyboard keycode code transmitted flag for last and 9th bits
keyst1 keyst2 keyst3 dflag
rmb rmb rmb rmb
************************************************************** * THE PORTS ARE SET UP USING PORTA 0-3 AS INPUTS MAKING USE * * OF THE INTERNAL INTERUPT GENERATION ON THESE I/0 LINES. * * STOP MODE IS ENTERED UNTIL A KEY IS PRESSED * ************************************************************** 0200 0200 0201 0203 0204 0205 0207 0209 020b 020d 020f 0211 0213 0215 0217 9a ad 04 9c 8e 20 fa a6 b7 b7 b7 a6 b7 a6 b7 81 f0 04 00 10 03 05 01 01 start wpres org cli bsr rsp stop bra lda sta sta sta lda sta lda sta rts $200
setup
wpres #$f0 ddra porta papd #$03 ddrb #$01 portb ; ; ; ; ; porta 0-3 inputs 4-7 as outputs set outputs high 0-3 pulldown portb 0-1 outputs
setup
; set portb 0 high
MOTOROLA 8
AN463/D
0078 0079 0080 0081 0082 0083 0084 0085 0086 0087 0088 0089 0090 0091 0092 0093 0094 0095 0096 0097 0098 0099 0100 0101 0102 0103 0104 0105 0106 0107 0108 0109 0110 0111 0112 0113 0114 0115 0116 0117 0118 0119 0120 0121 0122 0123 0124 0125 0126 0127 0128 0129 0130 0131 0132 0133 0134 0135 0136 0137 0138 0139 0140 0141 0142 0143 0144 0145 0146 0147 0148 0149 0150 0151 0152
************************************************************** * THE KEY READ IS DECODED FOR TRANSMISSION. * * THE TRANSMISSION PROTOCOL REQUIRES A START MESSAGE OF 9 * * ONES FOLLOWED BY THE KEYPRESSED CODE. THIS CODE IS * * CONTINUALLY RETRANSMITTED IF THE KEY IS HELD DOWN. AN END * * CODE OF 9 ONES TERMINATES THE TRANSMISSION AND THE DEVICE * * RETURNS TO STOP MODE. * ************************************************************** 0218 021a 021c 021e 0220 0222 0224 0226 0228 022a 022c 022e 0230 0232 0234 0236 0238 023a 023c 023e 0240 0241 0243 0245 0247 0249 024b 024d ad b6 b7 ad 12 a6 b7 ad b6 b7 13 ad b6 a4 26 ad b6 b1 26 ae 5a 26 20 12 a6 b7 ad 80 34 e1 e0 67 e3 ff e2 71 e1 e2 e3 69 00 0f 0f 16 e0 e1 07 c8 fd e3 e3 ff e2 4c presd bsr lda sta bsr bset lda sta bsr lda sta bclr bsr lda and bne bsr lda cmp bne ldx decx bne bra bset lda sta bsr rti keyscn keyst2 keyst1 decode 1,dflag #$ff keyst3 trnmit keyst2 keyst3 1,dflag trnmit porta #$0f endtrn keyscn keyst1 keyst2 endtrn #$c8 tloop sndagn 1,dflag #$ff keyst3 trnmit ; ; ; ; ; ; ; ; ; ; ; get key pressed save key to check if key held down decode key pressed set nineth bit to 1 send start data to transmission routine nine one's send key press message byte set nineth bit to 0
sndagn
; check if key still pressed ; end if no key pressed ; else check if same ; key pressed ; ; ; ; end if not delay before next transmission
tloop
endtrn
; send end message ; of nine ones
; re-enter stop mode
************************************************************** * WHEN A KEY IS PRESSED THE DEVICE COMES OUT OF STOP MODE * * THE KEYBOARD IS SCANNED TO SEE WHICH KEY IS PRESSED * ************************************************************** 024e 0251 0253 0255 0257 0259 025b 025c 025e 0260 0262 0264 0266 0268 0269 026a 026c 026e 0270 0272 0274 0276 0278 027a 027c 027e 0280 0282 0284 0286 cd b6 b7 a4 27 ae 9f b4 b7 bf b6 a4 27 58 5c 24 20 b6 b7 ae bf 11 b6 a4 27 b6 a4 b7 10 81 02 fc 00 e0 0f a7 ef e0 e1 00 00 0f 1c keyscn jsr lda sta and beq ldx txa and sta stx lda and beq lslx incx bcc bra lda sta ldx stx bclr lda and beq lda and sta bset rts datwt porta keyst1 #$0f start #$ef keyst1 keyst2 porta porta #$0f gotit ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; wait for debounce check if key press store inputs mask outputs stop if no key pressed set one row low read ouput lines combine with inputs store key code to find row which clears inputs check for inputs cleared mask outputs zero in key-press row clears inputs check if last row set lsb to 1 try portb output if not porta try next porta output row
nxtrow
02 ed e0 e1 f0 00 01 00 0f 06 e1 3f e1 01 tryb
tryb nxtrow keyst1 keyst2 #$f0 porta 0,portb porta #$0f gotit keyst2 #$3f keyst2 0,portb
gotit
; ; ; ; ; ; ; ; ;
set all porta outputs high set portb 0 output low check for inputs cleared mask outputs zero in key-press row clears inputs set individual code since last row store code set portb column high again
AN463/D
MOTOROLA 9
0153 0154 0155 0156 0157 0158 0159 0160 0161 0162 0163 0164 0165 0166 0167 0168 0169 0170 0171 0172 0173 0174 0175 0176 0177 0178 0179 0180 0181 0182 0183 0184 0185 0186 0187 0188 0189 0190 0191 0192 0193 0194 0195 0196 0197 0198 0199 0200 0201 0202 0203 0204 0205 0206 0207 0208 0209 0210 0211 0212 0213 0214 0215
************************************************************** * THE DECODE ROUTINE USES TWO ARRAYS. IT COMPARES THE KEY * * VALUE WITH THE ARRAY KEYDAT AND WHEN A MATCH IS FOUND THE * * CORRESPONDING ELEMENT IN THE ARRAY TVDAT BECOMES THE * * TRANSMITTED CODE. * ************************************************************** 0287 0289 028c 028e 0290 0291 0293 0296 0298 ae d6 b1 27 5a 26 d6 b7 81 18 03 02 e1 03 f6 03 1a e1 decode nxtel ldx lda cmp beq decx bne lda sta rts #$18 keydat,x keyst2 match nxtel tvdat,x keyst2 ; ; ; ; ; ; ; ; data array offset to zero look at each element of array compare with key read decode if match else try next element norm if no match found get key code store code to transmit
match
************************************************************** * THE TRANSMISSION PROTOCOL REQUIRES A PRE-BIT, A PRE-BIT * * PAUSE, A START BIT AND NINE DATA BITS, WHERE THE PRE-BIT * * AND THE START BIT ARE LOGIC '1'. * ************************************************************** 0299 029b 029d 02a0 02a3 02a6 02a9 02ab 02ad 02af 02b1 02b3 02b5 02b7 02b8 02ba 02bd 02bf 02c1 02c3 02c5 02c7 02c9 02cb 02cc 02ce 10 ad cd cd cd cd ad ae 34 25 ad 20 ad 5a 26 03 ad 20 ad ae ad ad ad 5a 26 81 e3 32 02 02 02 02 24 08 e2 04 28 02 18 trnmit fc fc fc fc bset bsr jsr jsr jsr jsr bsr ldx lsr bcs bsr bra bsr decx bne brclr bsr bra bsr ldx bsr bsr bsr decx bne rts 0,dflag send1 datwt datwt datwt datwt send1 #$08 keyst3 data1 send0 bitsnt send1 nxtbit 1,dflag,send00 send1 endend send0 #$18 datwt datwt datwt loopw ; ; ; ; ; ; ; ; ; ; ; initialise for first bit send pre-bit pre-bit pause equalling four half data periods
nxtbit
send start bit transmit 8 data bits get next bit send 1 if carry set send 0 if carry clear
data1 bitsnt
f3 e3 04 10 02 18 18 35 33 31 f7
send00 endend loopw
; ; ; ; ; ;
countdown bits sent send next bit if count not zero if flag set send 1 as nineth bit else send 0
; delay between successive ; transmissions
************************************************************** * TO TRANSMIT A LOGIC '1' A 32kHz PULSE TRAIN FOR 512us IS * * FOLLOWED BY A 512us PAUSE. * ************************************************************** 02cf 02d2 02d4 02d6 02d8 02da 01 a6 ad ad 10 81 e3 04 10 15 24 e3 send1 brclr lda bsr bsr bset rts 0,dflag,last0 #$10 burst datwt 0,dflag ; ; ; ; ; check if last bit was zero burst if last bit was 1 32kHz pulse for 512us wait 512us set flag as 1 sent
last0
MOTOROLA 10
AN463/D
0216 0217 0218 0219 0220 0221 0222 0223 0224 0225 0226 0227 0228 0229 0230 0231 0232 0233 0234 0235 0236 0237 0238 0239 0240 0241 0242 0243 0244 0245 0246 0247 0248 0249 0250 0251 0252 0253 0254 0255 0256 0257 0258 0259 0260 0261 0262 0263 0264 0265 0266 0267 0268 0269 0270
************************************************************** * TO TRANSMIT A LOGIC '0' A 512us PAUSE IS FOLLOWED BY A * * 32kHz PULSE TRAIN FOR 512us. IF A LOGIC '1' FOLLOWS A '0' * * THE 32kHz IS CONTINUED FOR 1024us TO AVOID A PROCESSING * * DELAY * ************************************************************** 02db 02dd 02e0 02e2 02e4 02e6 02e8 02ea ad 00 a6 20 a6 ad 11 81 1f e2 04 10 02 20 03 e3 send0 bsr brset lda bra lda bsr bclr rts datwt 0,keyst3,next1 #$10 datset #$20 burst 0,dflag ; ; ; ; ; ; ; wait 512us check if next bit is 1 single burst if 1 data set double burst required 32kHz pulse for 512us clear flag as 0 sent
next1 datset
************************************************************** * THE 32kHz PULSE TRAIN HAS A MARK TO SPACE RATIO OF 1 TO 3 * ************************************************************** 02eb 02ed 02ef 02f1 02f3 02f5 02f6 02f7 02f9 02fb 13 21 12 21 13 9d 4a 27 20 81 01 fe 01 fe 01 burst bclr brn bset brn bclr nop deca beq bra rts 1,portb * 1,portb * 1,portb ; portb 1 low ; portb 1 high ; portb 1 low ; decrement count ; end of burst ?
02 f0 endbur
endbur burst
02fc 02fe 02ff 0301 0302 0308 030e 0314 031a 0320 0326 032c
a6 52 4a 26 fd 81 31 32 34 38 11 12 13 00 f1 f2 f4 f8 3e 3d 3c 0d e1 e2 e4 e8 39 3b 3a 0c d1 d2 d4 d8 10 2c 2d 07 b1 b2 b4 b8 17 18 19 06 71 72 74 78 14 15 16 01
datwt loop
lda deca bne rts fcb fcb fcb fcb fcb fcb fcb fcb
#$52 loop
; count ; to provide 512us delay ; after instruction times
keydat
$31,$f1,$e1,$d1,$b1,$71 $32,$f2,$e2,$d2,$b2,$72 $34,$f4,$e4,$d4,$b4,$74 $38,$f8,$e8,$d8,$b8,$78 $11,$3e,$39,$10,$17,$14 $12,$3d,$3b,$2c,$18,$15 $13,$3c,$3a,$2d,$19,$16 $00,$0d,$0c,$07,$06,$01
tvdat
0332 80 03fa 03fa 02 18 03fc 03 32 03fe 02 00
softin
rti org fdb fdb fdb $3fa presd softin start ; scan keybrd on int ; software interrupt ; resett
AN463/D
MOTOROLA 11
All products are sold on Motorola's Terms & Conditions of Supply. In ordering a product covered by this document the Customer agrees to be bound by those Terms & Conditions and nothing contained in this document constitutes or forms part of a contract (with the exception of the contents of this Notice). A copy of Motorola's Terms & Conditions of Supply is available on request.
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. "Typical" parameters can and do vary in different applications. All operating parameters, including "Typicals", must be validated for each customer application by customer's technical experts. Motorola does not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part. Motorola and !are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer.
The Customer should ensure that it has the most up to date version of the document by contacting its local Motorola office. This document supersedes any earlier documentation relating to the products referred to herein. The information contained in this document is current at the date of publication. It may subsequently be updated, revised or withdrawn.
Literature Distribution Centres: EUROPE: Motorola Ltd., European Literature Centre, 88 Tanners Drive, Blakelands, Milton Keynes, MK14 5BP, England. ASIA PACIFIC: Motorola Semiconductors (H.K.) Ltd., Silicon Harbour Center, No. 2, Dai King Street, Tai Po Industrial Estate, Tai Po, N.T., Hong Kong. JAPAN: Nippon Motorola Ltd., 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141, Japan. USA: Motorola Literature Distribution, P.O. Box 20912, Phoenix, Arizona 85036.
!MOTOROLA
AN463/D

▲Up To Search▲

Price & Availability of AN463

	To Download AN463 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .