M38203M4 Datasheet, PDF (32/344 Pages) Mitsubishi Electric Semiconductor – 8-BIT SINGLE-CHIP MICROCOMPUTER

(1)Ports P0,P1
VL2/VL3
VL1/VSS
Segment output enable bit
(Note)
Direction register
Data bus
Port latch
Pull-down control
Segment output enable bit
Note. Bit 0 of port P0 direction register and
port P1 direction register.
(3)Ports P30–P37
VL2/VL3
VL1/VSS
Data bus
Pull-down
control
Segment output enable bit
(5)Port P41
Pull-up control
Direction register
Data bus
Port latch
output control bit
(7)Port P45
P45/TXD P-channel output disable bit
Serial I/O1 enable bit
Transmission enable bit
Direction register
Data bus
Port latch
Pull-up control
Serial I/O1 output
Fig. 12 Port block diagram (1)
MITSUBISHI MICROCOMPUTERS
3820 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(2)Ports P2,P42,P43,P57
Pull-up control
Direction register
Data bus
Port latch
Key input (Key-on wake up) interrupt input
INT0–INT2 interrupt input
(4)Port P40
Data bus
(6)Port P44
Serial I/O1 enable bit
Reception enable bit
Direction register
Data bus
Port latch
Pull-up control
(8)Port P46
Serial I/O1 synchronization clock
selection bit
Serial I/O1 enable bit
Serial I/O1 mode selection bit
Serial I/O1 enable bit
Direction register
Data bus
Port latch
Serial I/O1 input
Pull-up control
Serial I/O1 clock output
Serial I/O1 clock input
1-16
3820 GROUP USER’S MANUAL