Could you please help me identify this microcontroller? Here is what I know:

- 90% sure it is made by a Chinese or Korean company
- TQFP-44
- logo is a large "C" with a smaller "x" in the centre
- chip markings are: "XC8807" and "230B"
- 8Mhz external crystal
- 5V supply

My final goal is to obtain a datasheet and programming information for it, however even determining the manufacturer is proving difficult. I have already browsed all the semiconductor logo websites I could find.

If I can find out the company that made it, I'll try contacting them.

Thank you,

Hector

 

The only manufacturer I find is XILINX. Their components begin with XC (image search google). However, they have a different logo.

 

Yes, Infineon and Motorola also use "XC" prefixes. However I'm quite sure the chip I'm looking at is of Asian origin. It could be a clone of a more popular microcontroller, but searching for "*8807*" hasn't been very productive.

Other components on the board are:

• Array of push-pull transistors to drive external mecha
• TI RS-485 transceiver
• Power section
• SDA/SCL (I2C) to a Sony Image Processing chip

Notably absent from the board is an eeprom, which leads me to think that the microcontroller has built-in nv-ram/eeprom in addition to some type of flash to store the firmware.

There is also no visible JTAG port, however I do know the microcontroller can be programmed in-circuit.

My ultimate purpose is that I need to alter the commands being sent to the Sony Image processing chip and I'm trying to avoid having to use a "man-in-the-middle" attack to filter/replace the I2C bus data.

 

Didn't Xicor used also that prefix in the past?

Not with micros anyway, IIRC.

 

what board is it ?
can you post picture of full board, any names, marking on board

it can be conexant also (may be old logo, I am guessing it)