M38027E8SP Datasheet, PDF (12/51 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

(1) Ports P0, P1, P2, P32–P37
Direction register
Data bus
Port latch
(3) Ports P40–P43, P57
Direction register
Data bus
Port latch
Interrupt input
(5) Port P45
P45/TXD P-channel output disable bit
Serial I/O1 enable bit
Transmit enable bit
Direction register
Data bus
Port latch
Serial I/O1 output
(7) Port P47
Serial I/O1 mode selection bit
Serial I/O1 enable bit
SRDY1 output enable bit
Direction register
Data bus
Port latch
Serial I/O1 ready output
Fig. 4 Port block diagram (single-chip mode) (1)
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MITSUBISHI MICROCOMPUTERS
3802 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(2) Ports P30, P31
Direction register
Data bus
Port latch
D–A conversion output
DA1 output enable bit (P30)
DA2 output enable bit (P31)
(4) Port P44
Serial I/O1 enable bit
Receive enable bit
Direction register
Data bus
Port latch
Serial I/O1 input
(6) Port P46
Serial I/O1 synchronous
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 clock output
(8) Port P50
Direction register
Data bus
Port latch
Serial I/O1
external
clock input
Serial I/O2 input