The maximum clock frequency for the P87LPC764BD is 12 MHz, but it can be overclocked to 15 MHz with some limitations.
The oscillator can be configured using the OSCCFG register. The oscillator frequency can be set to either 12 MHz or 6 MHz, and the oscillator mode can be set to either internal or external.
The watchdog timer is a safety feature that resets the microcontroller if it fails to respond within a certain time period. This is useful for preventing the microcontroller from getting stuck in an infinite loop or other abnormal operation.
The UART can be configured using the UART registers. The baud rate, data bits, stop bits, and parity can be set using the UART control registers. The UART can be used for serial communication with other devices.
The maximum current that can be sourced or sunk by the I/O pins of the P87LPC764BD is 20 mA per pin, with a total current limit of 100 mA for all I/O pins combined.