Problem MCP9600 board Address

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iso2001
 
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Problem MCP9600 board Address

Post by iso2001 »

Hello ,
Subject Problem with MCP9600 Addressing.
Board in connected on the I2C bus which had pull up resistors, at 3.3V. Also as per Microchip manual I installed few different resistor combination to setup the different addresses - it don't work. Can you provide me with exact board schematic - to see if address pin on the chip is connected to the outside pin of the board ?
I use I2C program form Arduino IDE library. Program detect several other devices (OLED, D/A boards, etc) on the I2C bus but it don't detect MCP9600 device address - even when all others devices are removed. I purchased total of 4 of this boards and I don't believe that all 4 are bad.

Can you please provide some guidance how to solve problem.

Thank you,

.

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adafruit_support_carter
 
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Re: Problem MCP9600 board Address

Post by adafruit_support_carter »

Schematics are available on the Downloads page for the guide:
https://learn.adafruit.com/adafruit-mcp ... /downloads

The breakout takes care of the pull up resistors, so should not need to add any additional ones.

The address pin is pulled high on the breakout by default. There are solder pads that can be used to set different values.

Also note that the MCP9600 is known to have a troublesome I2C implementation:
https://learn.adafruit.com/i2c-addresse ... some-chips

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iso2001
 
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Re: Problem MCP9600 board Address

Post by iso2001 »

I spent few days, until i understand that MCP9600 board CAN NOT operate at normal 100KHz I2C bus speed. It operate at 10KHz I2C bus speed. That info should be posted on the front of the datasheet in bold letters.

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