MK68901 Datasheet, PDF (1/33 Pages) STMicroelectronics – MULTI.FUNCTION PERIPHERAL

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 PRO-
GRAMMABLE 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
Figure 1 : Pin connections.
PLCC52
DESCRIPTION
MFP
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 re-
duce chip count, thereby reducing system cost. The
MFP is completely 68000 bus compatible, and 24 di-
rectly addressable internal registers provide the ne-
December 1988
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