| Pin Number |
Pin Name |
Description |
|---|---|---|
| 1 | GND | Ground (Internally connected) |
| 2 | COL4 | Keyboard Column 4 |
| 3 | COL5 | Keyboard Column 5 |
| 4 | ROW1_R | Keyboard Row 1 Right |
| 5 | ROW1_L | Keyboard Row 1 Left |
| 6 | ROW3_L | Keyboard Row 3 Left |
| 7 | LED_LA | Anode of Left side Backlight LED |
| 8 | INT | Synaptics S350X Interrupt pin (Active Low) |
| 9 | SCL | Synaptics S350X I2C Clock input (Requires pull-up) |
| 10 | SDA | Synaptics S350X I2C Data I/O (Requires pull-up) |
| 11 | RST | Synaptics S350X Reset pin (Active low) |
| 12 | AVCC | Synaptics 3v3 analog voltage for touch sensing |
| 13 | DVCC | Synaptics 3v3 digital voltage for I/O |
| 14 | GND | Ground (Internally connected) |
| 15 | GND | Ground (Internally connected) |
| 16 | GND | Ground (Internally connected) |
| 17 | ROW2_L | Keyboard Row 2 Left |
| 18 | ROW2_R | Keyboard Row 2 Right |
| 19 | ROW3_R | Keyboard Row 3 Right |
| 20 | LED_ROW1C | Cathode of Row 1 Backlight LED |
| 21 | LED_ROW2C | Cathode of Row 2 Backlight LED |
| 22 | LED_RA | Anode of Right side Backlight LED |
| 23 | GND | Ground (Internally connected) |
| 24 | LED_ROW3C | Cathode of Row 3 Backlight LED |
| 25 | COL1 | Keyboard Column 1 |
| 26 | COL2 | Keyboard Column 2 |
| 27 | COL3 | Keyboard Column 3 |
| 28 | GND | Ground (Internally connected) |
Note: The S350X chip is refer to either S3501B or S3508A. In each different batch of the keyboard assembly may have different chip but they functionalities are the same.
More info about the reverse engineering of this Keyboard at https://hackaday.io/project/184529-reverse-engineering-bb-passport-keyboard
Connector : Hirose BM14B(0.8)-24DS-0.4V(53) (Element14)
correct
incorrect