MK68901
December1988
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
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 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-
MFP
1
DPIP48 PLCC52
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