COM81C17

The COM81C17 TPUART has two general purpose control pins.

The purpose of the built-in programmable baud rate generator in the COM81CUART is to generate sixteen popular baud rates and can be bypassed by programming ModeRegister bit 3 to accept a 16X external clock. The Baud Rate Generator needs to be programmed as desired as it does not assume any baud rate upon power up. The generator is based on a 5.0688 MHz CLOCK frequency and provides various baud rates with their corresponding theoretical and actual frequencies. The COM81C17 TPUART is a single chip UART with a built-in programmable baud rate generator that allows for asynchronous operation and offers features such as selectable baud rate clock frequencies, character length selection, stop bit selection, double buffering of data, and programmable interrupt generation. The TPUART also provides control pins that can be configured for modem or terminal control handshake signals or used as general-purpose input or output ports.

The maximum number of stop bits that can be selected in the COM81C17 TPUART is 2 stop bits.