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Discussion - Hardware / Fastest I2C transfer rate on FT2232HQ?
« on: February 13, 2024, 01:59:21 AM »
We're using an FT2232HQ to interface with an I2C peripheral. We're basically writing two bytes and then reading back four bytes over and over. We're seeing a delay of between 1-2ms between each transfer (this is once we change the latency timer to 2). Is there any way to reduce this dead time? Is it limited by the USB 'polling interval'? I understand the polling interval is 1ms for full-speed and 125us for high-speed USB. Does the FT2232HQ support high-speed USB operation for I2C?