MK68901

MK68901 MULTI–FUNCTION PERIPHERAL . . . . . . 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 48 PIN DIP OR 52 PIN PLCC 1 DPIP48 PLCC52 Figure 1 : Pin connections. DESCRIPTION The MK68901 MFP (Multi-Function Peripheral) is a combination of many of the necessary peripheral functions in a microprocessor system. Included are : Eight parallel I/O lines Interrrupt controller for 16 sources Four timers Single channel full duplex USART The use of the MFP in a system can significantly reduce chip count, thereby reducing system cost. The MFP is completely 68000 bus compatible, and 24 directly addressable internal registers provide the neDecember 1988 MFP 1/33 MK68901 necessary control and status interface to the programmer. The...