The maximum clock frequency for the PCF8584T is 100 kHz. However, it's recommended to use a clock frequency between 32 kHz and 50 kHz for optimal performance.
The PCF8584T can be reset by applying a low pulse to the RST pin. The pulse width should be at least 1 ms, and the reset pin should be pulled high after the pulse to allow the device to start up normally.
The CE (Chip Enable) pin is used to enable or disable the device. When CE is low, the device is enabled and can communicate with the microcontroller. When CE is high, the device is disabled and all inputs are ignored.
The PCF8584T can be configured for 12-hour or 24-hour mode by setting the HM (Hour Mode) bit in the control register. When HM is set to 0, the device operates in 24-hour mode, and when HM is set to 1, the device operates in 12-hour mode.
The SQW (Square Wave) pin outputs a square wave signal that can be used as a clock signal for other devices. The frequency of the square wave signal is determined by the clock frequency and the divider ratio set in the control register.
