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Results tagged with i2c
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user 240518
I²C (Inter-Integrated Circuit) is a multi-drop serial bus invented by Philips (now NXP) for communication between ICs on the same PCB, i.e. short distance.
2
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1
answer
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How to setup STM32 as I2C target device?
I've been trying to set up MCU (STM32 L432KC) as an I2C target device. I have previously tested it as a controller device to interface with a port expander (MCP2307) and it works perfectly fine. … RCC_APB1ENR1_I2C1EN;
GPIOA->MODER &=~(3<<18 | 3<<20);
GPIOA->MODER |= 2<<18 | 2<<20;
GPIOA->AFR[1] &=~(0xF<<4 | 0xF<<8);
GPIOA->AFR[1] |= (4<<4 | 4<<8); //PA9, PA10 - AF i2c …
- 65
2
votes
3
answers
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How do I figure the I2C timings for a peripheral?
The I2C timing specs are confusing me a bit. Here's a few timing characteristics from my peripheral :
It's basically the same as I2C timing specs provided by NXP. … Should I program my I2C controller on MCU for 1000 ns rise time only or could I go lower?
Similarly the specs for,say, START condition Hold time is given by a minimum 4 us. …
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