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TCA9554A: Interrupt signal(minimum width) detection and PWM signal

Yashwanth S N
Prodigy 110 points
Part Number: TCA9554A

Hi,

1. We have interrupt signal of 256us from BMS IC (default the signal will be high when interrupt occurs it will send 256us low pulse) to TCA9554A.

    Could we able to detect this signal and please provide information on the  what is the minimum time  interrupt signal can detect.

2. If i use for PWM signal generation(GPIO low and High) what is the maximum frequency signal can generate if we use I2C in standard and fast mode.

  • 0
    Guru 262900 points

    The minimum interrupt time is probably tiv = 4 µs.

    The output frequency depends entirely on how fast you can send I²C commands. If you continually send output port values in a stream, you can get a new output value every nine bits, i.e., every 22.5 µs in Fast Mode. This is usually not fast enough for PWM.