M38503MXH Datasheet, PDF (15/86 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(9) Port P24
Serial I/O1 enable bit
Receive enable bit
Direction
register
Data bus
Port latch
(10) Port P25
P-channel output disable bit
Serial I/O1 enable bit
Transmit enable bit
Direction
register
Data bus
Port latch
Serial I/O1 input
(11) Port P26
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 output
(12) Port P27
Pulse output mode
Serial I/O1 mode selection bit
Serial I/O1 enable bit
SRDY1 output enable bit
Direction
register
Data bus
Port latch
Serial I/O1 clock output
External clock input
(13) Ports P30-P34
Direction
register
Data bus
Port latch
Pulse output mode
Serial ready output
Timer output
CNTR0 interrupt
input
(14) Port P40
Direction
register
Data bus
Port latch
A-D converter input
Analog input pin selection bit
Pulse output mode
Timer output
CNTR1 interrupt
input
(15) Ports P41,P42
Direction
register
Data bus
Port latch
(16) Port P43
Serial I/O2 I/O
comparison signal control bit
Direction
register
Data bus
Port latch
Interrupt input
Fig. 11 Port block diagram (2)
Serial I/O2 I/O
comparison signal output
Interrupt input
15