MITSUBISHI MICROCOMPUTERS
3827 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(1) Ports P01–P07, P11–P15
Pull-up
VL2/VL3/VCC
Segment/Port
LCD drive timing
Segment data
Interface logic level
shift circuit
Segment
Data bus
Port latch
Port direction register
VL1/VSS
Port
Port/Segment
Port direction register
(2) Ports P00, P10
Pull-up
VL2/VL3/VCC
LCD drive timing
Segment/Port
Direction register
Segment data
Port latch
Interface logic level
shift circuit
Segment
Data bus
VL1/VSS
Port
Port/Segment
Port direction register
(3) Port P3
Pull-up
VL2/VL3/VCC
Segment/Port
LCD drive timing
Segment data
Interface logic level
shift circuit
Segment
Data bus
Port latch
VL1/VSS
Port
Port/Segment
Output control
(4) Ports P16, P17, P2, P41, P42
(5) Port P44
Pull-up control
Pull-up control
Serial I/O1 enable bit
Reception enable bit
Direction register
Direction register
Data bus
Port latch
Port latch
Data bus
Key input interrupt input
INT1, INT2 interrupt input
Serial I/O1 input
Except P16, P17
Fig. 10 Port block diagram (1)
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MITSUBISHI [ Mitsubishi Group ]
