Mcp2221 clock stretching. If it is longer, the MCP2221 gives a timeout error, visible at . The slave may stretch the clock to allow more time to handle data or prepare a response for the master device. Clock stretching occurs when a device on the bus holds the SCL line low, effectively pausing communication. 2 Bus-Matrix Module The Bus-Matrix module is the heart of the MCP2221. This is done by a mechanism referred to as clock stretching. But you're right, it doesn't support I2C clock stretching. The internal clock of the MCP2221 is fed into the CLKR module to provide a clock signal outside of the device. The device reduces external components by integrating the USB Full API reference Device Initialization class Device(VID=1240, PID=221, devnum=0, usbserial=None, scan_serial=False, open_timeout=0, cmd_retries=1, debug_messages=0, trace_packets=False) Creates a MCP2221 (A) device instance. Jun 17, 2019 ยท I am trying to control an Analog Devices programming resistor AD5254 by a USB to I2C master device from MicroChip MCP2221. I want to increase the i2c clock speed up to 1MHz, could it be possible? And if yes, how I can do it? Thanks for spending time checking my question. fl 59 vix91 8tagn4 xh1r nkw im kg f3ak 0a7k