PixArt Imaging Inc.
ADBS-A350 Optical Finger Navigation
Pinout of ADBS-A350 Optical Sensor
Pin Name
Description
Input/Output pin
Function
1
2
GND
Ground
XY_LED
XY LED driver connection
Must connect to LED-
(see schematics Figure 7a, 7b)
3
4
EVENT_INT
GPIO
Event Interrupt
(active low output)
O (CMOS output)
Open when not used
Default active low signal, can be changed in
Event control register 0x1d
General Purpose Input/
Output
I (Schmitt trigger input)/
O (CMOS output)
Pin can be used for FPD output, PWM output
or Dome/ Button click input. If configure as
input do not leave pin unconnected
5
6
VDDIO
Voltage supply for Input/
Output pins
Supply 1.8 V or 2.8 V
IO_MOSI_A0
TWI address set or
Master Out Slave In
I (Schmitt trigger input)
I (Schmitt trigger input)
SPI : MOSI (Master Out Slave In) signal
TWI Address Select, A0
Do no leave pin unconnected
7
8
IO_CLK
Serial clock input
Serial clock signal
IO_MISO_SDA TWI serial data or
Master In Slave Out
In SPI – CMOS output.
In TWI – open drain I/O
SPI : MISO (Master Input Slave Out) signal
TWI : serial data signal
9
IO_NCS_A1
TWI address set or
Chip Select
I (Schmitt trigger input)
SPI : NCS (chip select) active low signal
TWI Address Select, A1
Do no leave pin unconnected
10 NRST
Hardware Chip Reset
I (Schmitt trigger input)
Set to high when not used
Active low signal
11 GND
12 NC
Ground
No Connect
No connection
13 SHTDWN
Shutdown
(active high input)
I (Schmitt trigger input)
I (Schmitt trigger input)
Set to low when not used
Active high signal
14 VDDIO
15 IO_SELECT
16 NC
Voltage supply for I/O
SPI / TWI Select
No Connect
No Connect
No Connect
No Connect
Voltage supply
Ground
Sets I/O voltage
TWI : GND or SPI : High
No connection
No connection
No connection
No connection
Supply 1.8 V
17 NC
18 NC
19 NC
20 VDD
21 GND
22 GND
23 NC
Ground
No Connect
LED Cathode
LED Cathode
LED Cathode
LED Anode
No connection
24 LED-
25 LED-
26 LED-
27 LED+
28 GND
Note:
Must connect to XY_LED
Must connect to XY_LED
Must connect to XY_LED
Provide 1.8 V supply voltage
Ground
1. NC pins can be tied to VDD, GND or left open/ unconnected.
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PixArt Imaging Inc.
E-mail: fae_service@pixart.com.tw
2
PIXART [ PIXART IMAGING INC. ]
