M38258MCM Datasheet, PDF (16/70 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3825 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(1) Ports P0, P10–P15, P3
VL2/VL3/VCC
LCD drive timing Segment/Port
Segment data
Data bus
Port latch
Interface logic
level shift circuit
Port/Segment
Port ON/OFF
Segment
VL1/VSS
Port
Pull-down
(2) Ports P16, P17, P2, P40–P43, P50, P51
Pull-up control
Data bus
Direction
register
Port latch
Key-on wake up interrupt input
INT0–INT3 interrupt input
Except P16, P17, P40, P41
(4) Port P45
P45/TXD P-channel output disable bit
Serial I/O enable bit
Transmission enable bit
Direction
register
Data bus
Port latch
Pull-up control
(3) Port P44
Serial I/O enable bit
Reception enable bit
Direction
register
Data bus
Port latch
Pull-up control
Serial I/O input
(5) Port P46
Serial I/O synchronization clock
selection bit
Serial I/O enable bit
Serial I/O mode selection bit
Serial I/O enable bit
Direction
register
Data bus
Port latch
Pull-up control
Serial I/O output
(6) Port P47
Serial I/O mode selection bit
Serial I/O enable bit
SRDY output enable bit
Direction
register
Data bus
Port latch
Pull-up control
Serial I/O ready output
Fig. 12 Port block diagram (1)
Serial I/O clock output
Serial I/O clock input
(7) Ports P52, P53
Data bus
Direction
register
Port latch
Real time control bit
Real time port data
Pull-up control
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