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PAW3401
PAW3401 PS/2 OPTICAL MOUSE SENSOR General Description
The PAW3401 is a CMOS process optical mouse sensor single chip with PS/2 interface that serves as a nonmechanical motion estimation engine for implementing a computer mouse. Features Single 5.0 volt power supply Compatible with Microsoft Intelli 3D PS/2 Power Supply and IBM PS/2 mouse Precise optical motion estimation technology Complete 2-D motion sensor No mechanical parts Accurate motion estimation over a wide range of surfaces System Clock 24 MHz 28 inches/sec 20g 400/800/1000 CPI 3000 frames/sec 12 mA @Mouse moving (Normal) 5 mA @Mouse not moving (Sleep) Shrunk DIP12 Interface Optical Lens Wide operating supply range 4.5V ~ 5.5V PS/2 1:1 Key Specification
Speed High speed motion detection up to 28 inches/sec Acceleration High resolution up to 1000 CPI Resolution Power saving mode during times of no movement Frame Rate Support three buttons (R, M, L) and three Operating axes (X, Y, Z) Current Z axis support mechanical input Internal 10% accurate oscillator, external Package crystal-less
Ordering Information
Part Number CPI
PAW3401DK PAW3401DK-TD PAW3401DK-TJ
800 400 1000
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PixArt Imaging Inc. PAW3401 12 PIN PS/2 Optical Mouse Sensor
1. Pin Configuration 1.1 Pin Description
Pin # Name 1 2 3 4 5 6 7 8 9 10 11 12 BL LED Type IN OUT Definition Button left key input, normal pull-high (50k), press connect to low LED control Connect to resistor input Chip ground Chip power VDD, 5.0V
OSC_RES IN VSS VDD5V VREF CLOCK DATA BR BM Z2 Z1 GND PWR
BYPASS Analog voltage reference I/O I/O IN IN IN IN PS/2 mouse clock line PS/2 mouse data line Button right key input, normal pull-high (50k), press connect to low Button middle key input, normal pull-high (50k), press connect to low Z axis, support mechanical scroller input Z axis, support mechanical scroller input
1.2 Pin Assignment
Figure 1. Top View Pinout
Figure 2. Top View of Mouse
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2. Block Diagram and Operation
Figure 3. Block diagram The PAW3401 is a CMOS process optical mouse sensor single chip with PS/2 interface that serves as a nonmechanical motion estimation engine for implementing a computer mouse. It is based on new optical navigation technology, which measures changes in position by optically acquiring sequential surface images (frames) and mathematically determining the direction and magnitude of movement. The sensor is in a 12-pin optical package and comes with the resolution of 400/800/1000 counts per inch (CPI) and the rate of motion up to 28 inches per second. It is also featured crystal-less (Internal 10% accurate oscillator) to save customer's BOM cost. The PAW3401 includes PS/2 interface so that no mouse controller is needed to interface through PS/2. The PAW3401 can receive command and echo status or data format which are compatible with IBM PS/2 mouse and Microsoft 3D PS/2 mouse.
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2. Specifications 2.1 Absolute Maximum Ratings
Exposure to absolute maximum rating may affect device reliability. Symbol Parameter TSTG TA Storage Temperature Operating Temperature Lead Solder Temp ESD VDC VIN DC Supply Voltage DC Input Voltage -0.5 -0.5 Min. -40 -15 Max. 85 55 260 2 5.5 5.5 Unit C C C kV V V All I/O pin For 10 seconds, 1.6mm below seating plane. All pins, human body model MIL 883 Method 3015 Notes
2.2 Recommend Operating Condition
Symbol Parameter TA VDD VN Z R A FCLK FR Operating Temperature Power Supply Voltage Supply Noise Distance from Lens Reference Plane to Surface Resolution Acceleration Clock Frequency Frame Rate 24 3000 2.3 2.4 800 Min. 0 4.5 5.0 Typ. Max. 40 5.5 100 2.5 1000 20 Unit C V mV mm CPI g MHz frames/s 28 inches/sec @400CPI 16 inches/sec @800CPI inches/sec 13 inches/sec @1000CPI *Base on data rate : 100 report/sec Peak to peak within 0 - 100 MHz Notes
S
Speed
0
28
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2.3 AC Operating Condition
Electrical characteristics over recommended operating conditions. Typical values at 25 C, VDD = 5.0 V, FCLK = 24 MHz Symbol Parameters Tmca Tmci Tmdc Tsca Tsci Tsdc Tscd Mouse CLK Active Time Mouse CLK Inactive Time Time that Mouse Sample DATA from CLK Rising Edge System CLK Active Time System CLK Inactive Time Time from DATA Transition to Falling Edge of CLK Time from Rising Edge of CLK to DATA Transition Min. Typ. Max. Unit 40 40 14 40 40 12 28 Notes
us us us us Refer to Figure 6,7 us us us
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2.4 DC Electrical Characteristics
Electrical characteristics over recommended operating conditions. Typical values at 25 C, VDD = 5.0 V, FCLK = 24 MHz Symbol Parameter Type: PWR Supply Current IDD Mouse Moving (normal) Supply Current IDD Mouse not Moving (sleep1) Type: BL, BM, BR, B4, B5 RPH RPD VIH VIL RPH VOL IOH VOL Internal Pull-up Resistance Internal Pull-down Resistance Input High Voltage Input Low Voltage Internal Pull-up Resistance Output Low Voltage Output Pull-up Current Output Voltage LOW Type: Z1, Z2 2.0 50 5 700 0.8 0.6 360 Kohm V V Kohm V uA mV IOL= 10mA VOH = 2.0V I OL = 25mA Type: BL, BM, BR, B4, B5, Z1, Z2 Min. Typ. Max. Unit Notes
-
12 5
-
mA mA
-
50
-
Kohm
Type: CLOCK, DATA
Type: LED
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3. Z and 2D Assembly
Package Lid
Lens
Z OBJECT SURFACE
Figure 4. Distance from Lens Reference Plane to Surface
+X
+Y
ESD LENS RING
BASE PLATE
PLASTIC SPRING
CLIP
LED
SURFACE IS 0 REF. PCB SENSOR BASE PLATE ALIGNMENT POST
Unit: mm
Figure 5. 2D Assembly
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4. PS/2 Command Set Description
There are 16 valid commands that transmit between the system and The PAW3401. All other commands will cause an FE (Resend) response from the PAW3401. A second invalid command will cause an FC (error) response from the PAW3401.
4.1 PS/2 Command Set
Hex Code FF FE F6 F5 F4 F3, XX F2 F0 EE EC EB EA E9 E8, XX E7 E6 Command Reset Resend Set Default Disable Enable Set Sampling Rate Read Device Type Set Remote Mode Set Wrap Mode Reset Wrap Mode Read Data Set Stream Mode Status Request Set Resolution Set Scaling 2:1 Reset Scaling Response FA, AA, 00 XX, (XX, XX) FA FA FA FA, FA FA, 00 FA FA FA FA, XX, XX, XX FA FA, XX, XX, XX FA, FA FA FA
4.2 Set Sampling Rate (F3, XX)
Second Byte Hex Value (XX) 0A 14 28 3C 50 64 C8 Sampling Rate 10/sec 20/sec 40/sec 60/sec 80/sec 100/sec 200/sec
4.3 Status Request (E9)
Byte 1 Bit 0 1 2 3 4 5 6 7 0-7 0-7 Symbol BR BM BL 0 Scaling Enabled Remote mode 0 Resolution Sampling rate Description 1 = Right button pressed. 1 = Middle button pressed. 1 = Left button pressed. Always = 0, reserved for future use. 0 = Scaling 1:1; 1 = Scaling 2:1. 0 = Disabled; 1 = Enabled. 0 = Stream mode; 1 = Remote mode. Always=0, reserved for future use. Current resolution setting. Bit 0 = LSB. Current sampling rate. Bit 0 = LSB.
2 3
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4.4 Set Resolution (E8, XX)
Second Byte XX 00 01 02 03 Resolution (counts/mm) 1 2 4 8
4.5 Set Scaling 2:1 (E7)
Input 0 1 2 3 4 5 N (>=6) Output 0 1 1 3 6 9 2.0 * N
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5. Data Format
The PAW3401 supports three different PS/2-compatible packet formats, depending upon the following operational modes: * * Standard 2D mode (2D3B) Standard 3D mode (3D3B)
5.1 Standard 2D Mode Format
A standard 2D PS/2-compatible mouse motion report consists of a 3-byte packet defined as below. Byte 1 Bit 0 1 2 3 4 5 6 7 0-7 0-7 Symbol BL BR BM 1 Xs Ys XOV YOV X0 ~ X7 Description 1 = Left button pressed 1 = Right button pressed Always = 0, reserved for middle button Always = 1, reserved for future use X data sign, 1 = negative Y data sign, 1 = negative X data overflow, 1 = overflow Y data overflow, 1 = overflow X data (D0 - D7). A positive value indicates motion to the right; a negative value indicates motion to the left. Bit 0=LSB. Y0 ~ Y7 Y data (D0 - D7), A positive value indicates device motion upward; a negative value indicates motion downward. Bit 0=LSB.
2 3
5.2 Standard 3D Mode Format
A standard 3D PS/2-compatible mouse motion report consists of a 4-byte packet defined as below. Byte 1 Bit 0 1 2 3 4 5 6 7 0-7 0-7 0-7 Description 1= Left button pressed 1 = Right button pressed 1= Middle button pressed Always = 1, reserved for future use X data sign, 1 = negative Y data sign, 1 = negative X data overflow, 1 = overflow Y data overflow, 1 = overflow X data (D0 - D7). A positive value indicates motion to the right; A negative value indicates motion to the left. Bit 0 = LSB. Y0 ~ Y7 Y data (D0 - D7). A positive value indicates device motion upward; A negative value indicates motion downward. Bit 0 = LSB. Z0 ~ Z7 Z-wheel motion data (D0 - D7). A positive value indicates device motion downward; a negative value indicates motion upward. The Z0Z7 limit value is 7. Bit 0 = LSB. Symbol BL BR BM 1 Xs Ys XOV YOV X0 ~ X7
2 3 4
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6. Mouse Mode Selection
The Set Sampling Rate command is used to set the device operating modes. Whenever the mouse received command 'FF', it will reset to standard mode (2D3B) mode. After power-on reset is initiated, the mouse is set to standard PS/2 mode. The Device ID is available through the PS/2 Read Device Type (0xF2) command. For a device in standard 2D mode, the device will report an ID of 0x00. For a device in standard 3D mode, the device will report an ID of 0x03. Mode Standard 2D mode (2D3B) Standard 3D mode (3D3B) Device ID 0x00 0x03
6.1 Standard 3D Mouse (3D3B) Command Sequence
After Reset, the device will be in standard 2D mode. By sending the Set Sampling Rate command series as follows, the device is set to standard 3D mode. Command F3 C8 F3 64 F3 50 F2 Response FA FA FA FA FA FA FA, 03
Notice that the Set Sampling Rate commands are valid, and the device report rate will be the value of the last command; that is, 0x50 after this series of commands.
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7. PS/2 Data Transmission 7.1 Mouse Send Data Out to Host
When the mouse is ready to transmit data, it must first check for mouse "inhibit" or system "request to send" status on clock and data lines. If CLK is low (inhibit status), data shall be continuously updated in the mouse and no transmissions shall be started. If CLK is high and DATA is low (request-to-send), data is updated. Data is received from the system and no transmission are started by the PAW3401 until CLK and DATA both high. If CLK and DATA are both high, the transmission is ready. DATA is valid prior to the falling edge of CLK and beyond the rising edge of CLK. During transmission, the PAW3401 checks for line contention by checking for an inactive level on CLK at intervals not to exceed 100 microseconds. Contention occurs when the system lowers CLK to inhibit the PAW3401 output after the PAW3401 has started a transmission. If this occurs prior to the rising edge of the tenth clock (parity bit), the PAW3401 internally stores the data package in its buffer and return DATA and CLK to an active level. If the contention does not occur by the tenth clock, the transmission is complete. Following a transmission, the system can inhibit the PAW3401 by holding CLK low until it can service the input or until the system receives a request to send a response if necessary.
Tsca
1st CLK 2 nd CLK 10 th CLK 11th CLK
CLK
Tsdc Tscd
.........
Tsci
Tpi
DATA
Start bit
.........
Bit0 - Bit7
...
Parity bit Stop bit
.........
Figure 6. Mouse send data out to host
7.2 Mouse Receive Data from Host
System first check to see if the PAW3401 is transmitting data. If the PAW3401 is transmitting, the system can override the output forcing CLK to an inactive level prior to the tenth clock. If the PAW3401 transmission is beyond the tenth clock, the system receives the data. If the PAW3401 is not transmitting or if the system chooses to override the output, the system forces CLK to an inactive level for a period of not less than 100 microseconds while preparing for output. When the system is ready to output "0" start bit, it allows CLK to go to active level. If "request-to-send" is detected, the PAW3401 clocks in 11 bits. Following the tenth clock, the PAW3401 checks for an active level on the DATA line, and if found, force DATA low (line control bit), and clock once more. If occurs framing error, the PAW3401 continue to clock until DATA is high, then clock the line control bit and request a resend. For each system command or data transmission to the PAW3401 that requires a response, the system must wait for the PAW3401 to response before sending its next output.
Tmca
CLK
Inhibit
1 st CLK
2 nd CLK
9 th CLK
10 th CLK
11 th CLK
......
Tmci
Tmdc
Tmlc
DATA
Start bit
.........
Bit0 - Bit7
...
Parity bit Stop bit
Line control bit
...
Figure 7. Mouse Receive Data from Host
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6. Referencing Application Circuit
*Y1 ?Mhz
U1
*R3
VDD_5V
R1
*1
NC BL LED OSC_RES VSS VDD5V VREF
NC Z1 Z2 BM BR DATA CLOCK
*14
ENSW1
Z1 Z2
BM
BL
1
12
VDD_5V
D1
LED *R2
*C4 1uF/?
+
2
3
4
5
11
COM
C5
+
10
C2
JP1
9
BR
0.1uF 10uF
VDD_5V
1 2
8
R4
0
6
7
R5
C6 27pF
C7 27pF
0
3 4
C1
+
C3
PAW3401
1uF
0.1uF
Note: 1. *R2 is left for 12 pin package
2. *C4 , *R3 and *Y1 is left for 14 pin package with USB interface
Figure 8. Application Circuit for PAW3401
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7. Recommended Value for R1
Radiometric intensity of LED Bin limits (mW/Sr at 20mA) LED Bin Grade N P Min. 14.7 17.7 Typ. Max. 17.7 21.2 25.4
Q 21.2 Note: Tolerance for each bin will be 15%
R1 value (ohm), VDD = 5.0V (refer to Figure 8) LED Bin Grade N P Q Min. 43 43 43 Typ. 56 56 56 Max. -
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8. Z-axis Waveform
Z2
Z1
State
2
0
1
3
2
0
+1
+1
+1
+1
+1
Z2
Z1
State
1
0
2
3
1
0
-1
-1
-1
-1
-1
Z-axis input STATE Z2 0 1 2 3 0 0 1 1 Z1 0 1 0 1
Figure 9. Z-axis Waveform
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9. Package Information 9.1 Package Outline Drawing
12 11 10 9 8 7
1
2
3
4
5
6
11.68 0.460
3.20 0.126 1.42 0.056
10.16 0.400
1.02 0.040
5.08 0.200 0.254 0.010 0.457 0.018 1.778 0.070 Max. 12 14.22 +/- 0.2 0.560 +/-0.0079 4.064 0.160 3 4 5 6
6.223 0.245 4.826 0.190 1 2
5.461 0.215
5.080 0.200
NOTES: 1. All dimensions in MM/INCH. 2. Dimensions tolerance: +/- 0.10mm 3. Maxmumflash: +0.2mm
4.55 0.179 12 11 10 9 8 7
5.56 0.2189
0.80 0.031
Figure 10. Package Outline Drawing
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9.2 Recommended PCB Mechanical Cutouts and Spacing
4.064 0.160 1 2 3 4 5 6 7.544 0.297 16.942 0.667 12.877 0.507 9.068 0.357
1.778 0.070
6.985 0.275 8.89 0.35
10.221 0.402
0.711 0.028
1.194 0.047
12 0.711 0.028
11
10
9
8
7 27.94 1.100 3.251 0.128
All Dimension : mm/inch Back Side
Figure 11. Recommended PCB Mechanical Cutouts and Spacing
10. Update History
Version V1.0 V1.1 Update Creation, Preliminary 1st version Modify Referencing Application Circuit Date 09/14/2006 12/29/2006
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