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TT1589(TT6221/TT6222) Consumer
TT6221-1 & TT6222-1 REMOTE CONTROL TRANSMITTER
General Description
TT6221-1 and TT6222-1 are high performance remote control transmitter COMS ICA it is specially designed for use on infrared remote control applicationsC The custom codes (Max.) of TT6221-1 and TT6222-1 are available by setting external diodes and resistorsC The transmission code consists of " leader pulse "B " 16 bits custom code " and " 16 bits data code "C
Feature Description
High performance CMOS technology Low power consumption ( VDD = 2.0 a 3.3 V ) TT6221-1 : 32 function keys and 3 double action keys and 64 + 6 function codes are available ( Using D7 pin ) TT6222-1 : 64 function keys and 3 double action keys and 128 + 6 function codes are available ( Using D7 pin ) PPM ( Pulse Position Modulation ) code method Ceramic resonator frequence 455 KHz DOUT with a 38 KHz carrier for IR medium Custom codes can be selected ( Using external diodes and resistors )
Block Diagram
X1 X2 DOUT LED
Oscillator
Divider
Data select & Buffer
R1 R8
Keyboard Matrix & Gate Circuit
Data ROM & Registers
Timing Generate Counter control
Sync. circuit
Binary Detector
C1
C8
AIN
D7
VDD
VSS
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TT1589(TT6221/TT6222) Consumer
Package configuration
TT6221
1 2 3 4 5 6 7 8 9 10 R1 R2 R3 R4 DOUT VDD D7 X2 X1 VSS
TT6221-1
AIN C1 C2 C3 C4 C5 C6 C7 C8 LED 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 11 12
TT6222-1 TT6222-1
TT6222
R3 R4 R5 R6 R7 R8 DOUT VDD D7 X2 X1 VSS
R2 R1 AIN C1 C2 C3 C4 C5 C6 C7 C8 LED
24 23 22 21 20 19 18 17 16 15 14 13
Pin Description
TT6221-1 TT6222-1 PIN No. PIN No. 3 1 4 2 3 4 5 6 5 7 6 8 7 9 8 10 9 10 11 12 13 14 15 16 17 18 19 20 1 2 11 12 13 14 15 16 17 18 19 20 21 22 23 24 PIN Name R3 R4 R5 R6 R7 R8 DOUT VDD D7 X2 X1 VSS LED C8 C7 C6 C5 C4 C3 C2 C1 AIN R1 R2 I/O I I I I I I O P I O I P O I/O I/O I/O I/O I/O I/O I/O I/O I I I DESCRIPTION Row control for keyboard matrix ( active high ) Row control for keyboard matrix ( active high ) Row control for keyboard matrix ( active high ) Row control for keyboard matrix ( active high ) Row control for keyboard matrix ( active high ) Row control for keyboard matrix ( active high ) Serial data output with 38 KHz carrier Positive power supply Data code D7 setting 455 KHz resonator oscillator output 455 KHz resonator oscillator input Negative power supply Indicator LED output Column control for keyboard matrix Column control for keyboard matrix Column control for keyboard matrix Column control for keyboard matrix Column control for keyboard matrix Column control for keyboard matrix Column control for keyboard matrix Column control for keyboard matrix Low byte of custom codes ( 8 bits ) scan input Row control for keyboard matrix ( active high ) Row control for keyboard matrix ( active high )
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TT1589(TT6221/TT6222) Consumer
Functional DescriptionG
Keyboard scan
TT6221-1 and TT6222-1 Stay in the stand-by state , the oscillator is OFF and the standby current < 1uA C The TT6221-1 consists of 32 function keys and TT6222-1 consists of 64 function keysC The keyboard form of the TT6221-1 & TT6222-1 are as shownC The TT6221-1 keyboard form :
C1 R1 R2 R3 R4 K11 K21 K31 K41 C2 K12 K22 K32 K42 C3 K13 K23 K33 K43 C4 K14 K24 K34 K44 C5 K15 K25 K35 K45 C6 K16 K26 K36 K46 C7 K17 K27 K37 K47 C8 K18 K28 K38 K48
The TT6222-1 keyboard form :
C1 R1 R2 R3 R4 R5 R6 R7 R8 K11 K21 K31 K41 K51 K61 K71 K81 C2 K12 K22 K32 K42 K52 K62 K72 K82 C3 K13 K23 K33 K43 K53 K63 K73 K83 C4 K14 K24 K34 K44 K54 K64 K74 K84 C5 K15 K25 K35 K45 K55 K65 K75 K85 C6 K16 K26 K36 K46 K56 K66 K76 K86 C7 K17 K27 K37 K47 K57 K67 K77 K87 C8 K18 K28 K38 K48 K58 K68 K78 K88
Transmission codes
When one of the keys ( 32 keys or 64 keys ) is triggered over 36 msA the oscillator is enable and the IC is activatedC If the key is pressed and held for 108 ms or lessA the 108 ms transmission codes of the TT6221-1 & TT6222-1 consist of a 9 ms header code,a 4.5 ms off codeA 16-bits custom codes ( 18 ms a 36 ms )A 8-bits data codes ( 9 ms a 18 ms ) and the inverse codes of the 8-bits data codes ( 18 ms a 9 ms )C After the pressed key is held for 108 msA if the key is still held downA the transmission codes turn out to be a composition of header code ( 9 ms ) and off code ( 2.5 ms ) onlyC
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TT1589(TT6221/TT6222) Consumer
The following is an illustration of the transmission codes:
Key input
Key Enables
36 ms min
Fosc = 455 KHz
X2
4.5 ms
2.25 ms 38 KHz 1/3 duty carrier
2.25 ms
DOUT
9 ms 45 ms - 63 ms custom & data code 108 ms
9 ms
9 ms
0.56 ms
0.56 ms
108 ms
Output format for the
DOUT
The output code carrier ( 38 KHz ) of the DOUT pin :
38 KHz Carrier
8.77 us 26.3 us
38 KHz carrier form
The transmission codes employ the PPM ( Pulse Position Modulation ) method to represent their two logic states by bit-0 ( 1.12 ms ) and bit-1 ( 2.24 ms ) :
bit-0
0.56 ms data period ( 1.12 ms ) 38 KHz carrier
bit-1
0.56 ms data period ( 2.24 ms ) 38 KHz carrier
bit-0 and bit-1 Logic states form
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TT1589(TT6221/TT6222) Consumer
To set the custom codes ( A0 - - - A15 )
The algorithm rule of the custom codes ( A0 - - - A15 ) can be selected by mask optionA and the user can choose the TT6221-1 & TT6222-1C The TT6221-1 & TT6222-1 : The value of ROM1 (8 bits) & ROM2 (8 bits) are both " 00H "C The A0 - - A7 are set by logical OR between the switches (S0 - - S7) and ROM1C The A8 - - A15 equal some bits be inverted of A0 - - A7A the inversion are decided by logical OR between the switches (S8 - - S15) and ROM2C For example :
AIN C1
200K 200K
TT6221-1 & TT6222-1
C2
200K
C3
200K
C4
200K
C5
200K
C6
200K
C7
200K
C8
S8 S0
1N4148
S9 S1
1N4148
S10 S2
1N4148
S11 S3
1N4148
S12 S4
1N4148
S13 S5
1N4148
S14 S6
1N4148
S15 S7
1N4148
1 : Switch close
External switch S0 - - - S15 : 0 1 0 S0 - - S7 101 ROM1 000
0 : Switch open
00 1 1 S8 - - S15 0001 ROM2 000 00
On chip ROM1A ROM2 :
0
0
0
00
0
0
0
00
A0 - - A7 :
(S0 - - S7) OR ROM1 01010100 (S8 - - S15) OR ROM2 11000100 xxx 1 : non-inversion 0 : inversion
A0 A1 A5 A2B A3B A4B A6B A7B
A8' - - A15' :
A8 - - A15 : A0 - - A7 101
0
1
1
0
1
1
11
Custom codes A0 - - - A15 :
0
1
0
00
0
1
A8 - - A15 1011
11
The vaules of the data codes ( D0 - - D7 )
The TT6221-1 contains 32 function keys and the TT6222-1 contains 64 function keysC Each key corresponds to one data codeC The TT6221-1 & TT6222-1 provide 3 double keysC
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TT1589(TT6221/TT6222) Consumer
DATA CODES D0 - - - - - - - - - - D6 0000000 1000000 0100000 1100000 0010000 1010000 0110000 1110000 0001000 1001000 0101000 1101000 0011000 1011000 0111000 1111000 1010110 0110110 KEY NAME K15 K25 K35 K45 K16 K26 K36 K46 K17 K27 K37 K47 K18 K28 K38 K48 K16+K46 DATA CODES D0 - - - - - - - - - - D6 0000100 1000100 0100100 1100100 0010100 1010100 0110100 1110100 0001100 1001100 0101100 1101100 0011100 1011100 0111100 1111100 1110110
The TT6221-1 data codes :
KEY NAME K11 K21 K31 K41 K12 K22 K32 K42 K13 K23 K33 K43 K14 K24 K34 K44 K16+K26 K16+K36 D7 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 D7 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
The TT6222-1 data codes :
KEY NAME K11 K21 K31 K41 K12 K22 K32 K42 K13 K23 K33 K43 K14 K24 K34 K44 K51 K61 K71 K81 K52 K62 K72 K82 K53 K63 K73 K83 K54 K64 K74 K84 K16+K26 K16+K36 DATA CODES D0 - - - - - - - - - - D6 0000000 1000000 0100000 1100000 0010000 1010000 0110000 1110000 0001000 1001000 0101000 1101000 0011000 1011000 0111000 1111000 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 D7 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 KEY NAME K15 K25 K35 K45 K16 K26 K36 K46 K17 K27 K37 K47 K18 K28 K38 K48 K55 K65 K75 K85 K56 K66 K76 K86 K57 K67 K77 K87 K58 K68 K78 K88 K16+K46 DATA CODES D0 - - - - - - - - - - D6 0000100 1000100 0100100 1100100 0010100 1010100 0110100 1110100 0001100 1001100 0101100 1101100 0011100 1011100 0111100 1111100 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 D7 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1
The 8-bit data codes of will define the inverse codes of the other 8-bit data codes ( D8 - D15 ) .D7 is defined by an external switch. Code D7=0 -> connect to vdd.
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TT1589(TT6221/TT6222) Consumer
Code D7=1 -> connect to vss.
Function Keys control
If two or more keys are depressed simultaneously ( except K16+K26 & K16+K36 & K16+K46 )A the transmission is disabled by the multi-depression prevention circuitC As regards the key transmission priority in the case of two depressionsA with simultaneous depressions ( 36 ms ) transmission is disabled and first depressionsA later remainder priority is usedC When a key is pressedA reading of the custom code and key data code is startedA and DOUT output begins 36 ms laterA so that if the key is begin depressed during this 36 ms interval one transmission is performedC If a key is held down for 108 ms or longerA consecutive transmissions of the leader code only are performed while the key is depressed depressed depressedC As a key interruption operation can handle an interval of up to 126 ms ( from ON to ON ) C It is possible to configure a system with an extremely fast response timeC Two or more keys are depressed ( except K16+K26 & K16+K36 & K16+K46 ) :
K16 input Kmn input
36 ms 36ms < t < 126 ms
K16 Enables Kmn Enables
DOUT
36 ms
K16 code transmission
108 ms ( min. )
(A)
K16 input Kmn input
t < 36 ms
K16 Enables Kmn Enables
DOUT
The transmission is disabled.
(B)
Kmn input K16 input
36 ms 36ms < t < 126 ms
Kmn Enables K16 Enables
DOUT
36 ms
Kmn code transmission
108 ms ( min. )
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TT1589(TT6221/TT6222) Consumer
(C)
Kmn input K16 input
t < 36 ms
Kmn Enables K16 Enables
DOUT
The transmission is disabled.
(D)
Kmn input
Kmn Enables
t < 108 ms
DOUT
36 ms
Kmn code transmission
108 ms ( min. )
(E)
Kmn input
Kmn Enables
t > 108 ms
DOUT
36 ms
Kmn code transmission
108 ms ( min. ) 108 ms ( min. )
(F)
To avoid the mistakes made by keyboard scanning or simultaneous two-key input A excep 3 double key active function (K16+K26A K16+K36A K16+K46) A the TT6221 & TT6222 are facilitated with 36 ms starting timeC The 3 double keys are depressed ( K16+K26 & K16+K36 & K16+K46 ) : Kd6 : one of ( K26 or K36 or K46 )
K16 input Kd6 input
36 ms t > 126 ms
K16 Enables Kd6 Enables
DOUT
36 ms
K16 code transmission K16+Kd6 code transmission
108 ms 108 ms
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TT1589(TT6221/TT6222) Consumer
Absolute maximum ratingsG
ITEM DECRIPTION SYMBOL Supply voltage VDD Operating temperature Topr Storage temperature Tstg RATINGS 2.0 a 3.3 2 0 a 70 5 0 a 125 UNIT V J J
Electronic characteristicsG
ITEM Supply voltage Stand-by current ( Oscillator OFF ) Operating current ( Oscillator ON ) Driving current ( DOUT ) Sinking current ( DOUT ) Driving current ( LED ) Sinking current ( LED ) Driving current ( C1 / C8 ) Sinking current ( C1 / C8 ) Input HIGH voltage( R1 - R8) Input LOW voltage ( R1 - R8) Input HIGH voltage( C1 -C8 ) Input LOW voltage ( C1 - C8) Input HIGH voltage ( AIN) Input LOW voltage ( AIN) Pull LOW resistor ( AIN ) Pull HIGH resistor ( AIN ) Pull LOW resistor ( R1 - R8 ) Pull LOW resistor ( C1 / C8 ) System frequence ( X2 ) SYMBOL ISB IOP IOH1 IOL1 IOH2 IOL2 IOH3 IOL3 CONDITION VDD VDD x 3.0 V 3.0 V 3.0 V 1.5 V 3.0 V 0.3 V 3.0 V 2.7 V 3.0 V 0.3 V 3.0 V 2.7 V 3.0 V 0.3 V 3.0 V 3.0 V 3.0 V 3.0 V 3.0 V 3.0 V - 1.0 20 1.9 0 1.0 0 1.25 0 MIN. TYPE MAX. 2.0 3.0 3.3 1.0 60 - 12.0 3.0 0.8 3.0 0.5 3.0 0.5 1.0 - 400 2.4 - 2.0 25 240K 290K 400K 900K 455 100 UNIT V uA uA mA mA uA mA mA uA V V V V V V [ [ [ [ KHz
VIH1 VIL1 VIH2 VIL2 VIH3 VIL3 RPL1 RPH RPL2 RPL3 Fosc Resonator 455 KHz
VDD x No lead VDD x VO x VDD x VO x VDD x VO x VDD x VO x VDD x VO x VDD x VO x VDD x VDD x VDD x VDD x VDD x VDD x
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TT1589(TT6221/TT6222) Consumer
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TT1589(TT6221/TT6222) Consumer
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