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68901Q-04
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 DESCRIPTION The MK68901 MFP (Multi-Function Peripheral) is a combination of many of the necessary peripheral functions in a microprocessor system. Included are : 1 DPIP48 PLCC52 Figure 1 : Pin connections. MFP 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 1/33
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