chip pinout

     9-scroll down~
     8-scroll up~
     7-left click~
     6-right click~
     5-
     4-
     3-clk
     2-data
     1-
    o <- dot on chip
44444
45678
|||||
||
|+-GND
+5V

T1004 920-000191-03RevA

connector pinout

1	5V	T20, T22
2	DATA
3	CLK
4	RIGHT CLICK	T4
5	LEFT CLICK	T6
6	GND	T11, T10
7	SCROLL UP	T5
8	SCROLL DOWN

N32N LS-734

Additional U shaped board from Compaq laptop with buttons on it

JP4 - to synaptics touch pad
JP1 - to motherboard

1	red	5V
2	green	5V
3	yellow	switch SW5
4	blue	LED D1
5	gray	GND
6	pink	DATA
7	cyan	CLK
8	purple	GND

Connecting to PS2 port demo: https://youtu.be/78CuKT-gVV4

T1006 920-000489-01RevA

connector pinout

1	5V	T20, T22 (after R470)
2	DATA	T11
3	CLK	T10
4	GND	T23, T30
5
6		PIN4
7
8		PIN5

test points:

T20 - 5V - R470 - T22
T23, T30 - GND
T11 - data
T10 - clk
T7 - left
T6 - right
T4 - up
T5 - down