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Electronics => Projects, Designs, and Technical Stuff => Topic started by: JacquesBBB on April 30, 2016, 09:16:07 am

Title: What is this component ?
Post by: JacquesBBB on April 30, 2016, 09:16:07 am

I am searching to understand  the coding of the  toner chips in Laser printers.

I have for the moment failed on the Lexmark CS310 chip
https://www.eevblog.com/forum/projects/lexmark-toner-chip-ti046b1/msg925378/#msg925378 (https://www.eevblog.com/forum/projects/lexmark-toner-chip-ti046b1/msg925378/#msg925378)

and in order to make some progress,  experiment with another chip from a Toshiba toner.
But I cannot recognise the chip.  I made a schematics, but may have  swap GND and VCC ?
What do you think ?

The component is marked  324 4LS but what is  It ?
(https://www.eevblog.com/forum/projects/what-is-this-component-67294/?action=dlattach;attach=221125)

Title: Re: What is this component ?
Post by: JacquesBBB on April 30, 2016, 10:32:57 am

After testing, I have an answer for I2C communication with

1 -> VCC
2 -> SCL
3 -> SDA
4 -> GND

With an I2C address of 0x61

Title: Re: What is this component ?
Post by: JacquesBBB on April 30, 2016, 12:31:25 pm

The problem is that I am not able to communicate with it using I2C with bus pirate

I2C>(1)
Searching I2C address space. Found devices at:
0x00(0x00 W) 0xC2(0x61 W) 0xC3(0x61 R)

I2C>[0xC2  0 0 1 2 3 4 5]
I2C START BIT
WRITE: 0xC2 ACK
WRITE: 0x00 ACK
WRITE: 0x00 ACK
WRITE: 0x01 ACK
WRITE: 0x02 ACK
WRITE: 0x03 ACK
WRITE: 0x04 ACK
WRITE: 0x05 ACK
I2C STOP BIT
I2C>[0xC2  0 0][0xC3 r:5]
I2C START BIT
WRITE: 0xC2 ACK
WRITE: 0x00 ACK
WRITE: 0x00 ACK
I2C STOP BIT
I2C START BIT
WRITE: 0xC3 ACK
READ: 0xFF  ACK 0xFF  ACK 0xFF  ACK 0xFF  ACK 0xFF
NACK
I2C STOP BIT


Does anybody have a clue ?