Optical mouse sensors?

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Gordon
I just opened up a £2.50 wireless optical mouse and it's got a KA8 E4230DB sensor in it. Seems to have roughly the same pinout as other sensors:
```
         _______
LED   --|       |-- SCK
GND   --|       |-- SDA
VCC   --|       |-- not connected
Van   --|_______|-- not connected

Van = analog volts - just a capacitor to GND
```
But looking at the data on SCK/SDIO I get:
```
// If no movement :
0x00, 0x30, 0x02,0x0Z 
// If movement
0x00, 0x30, 0x02,0x8Z, ....bytes with DX/DY data in...
```
Where Z is 4,5 or 6 depending on the mouse DPI (this must have been set somewhere).

It's around 360kHz bitrate, and sck left high on idle. However if I disconnect the little wireless module I'm really struggling to be able to drive it myself.

It'd be great if I could find a datasheet, but I can't see anything that's even remotely like it :( Shame, it'd be excellent for little robot projects. Even better if I could figure out what to send to read the framebuffer from it.

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