DESCRIPTION

The use of the CMFP in a system can significantly reduce chip count, thereby reducing system cost. The CMFPis completely 68000 bus compatible, and 24 directly addressable internal registers provide the necessary control and status interfaceto theprogrammer.

The TS68HC901 CMFP (CMOS Multi-Function Peripheral) is a combination of many of the necessary peripheral functions in a microprocessor system. Included are :

■ 8 INPUT/OUTPUT PINS

• Individually programmable direction

• Individual interrupt source capability

- Programmable edge selection

■ 16 SOURCE INTERRUPT CONTROLLER

• 8 Internal sources

• 8 External sources

• Individual source enable

• Individual source masking

• Programmable interrupt service modes

- Polling

- Vector generation

- Optional In-service status

• Daisy chaining capability

■ FOUR TIMERS WITH INDIVIDUALLY PROGRAMMABLE PRESCALING

• Two multimode timers

- Delay mode

- Pulse width measurement mode

- Event counter mode

• Two delay mode timers

• Independent clock input

• Time out output option

■ SINGLE CHANNEL USART

• Full Duplex

• Asynchronous to 65 kbps

• Byte synchronous to 1 Mbps

• Internal/External baud rate generation

• DMA handshake signals

• Modem control

• Loop back mode

■ 68000 BUS COMPATIBLE