M38503MXH Datasheet, PDF (14/86 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
3850 Group (Spec. H)
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(1) Port P00
Data bus
Direction
register
Port latch
Serial I/O2 input
(3) Port P02
P02/SCLK2 P-channel output disable bit
Serial I/O2 synchronous
clock selection bit
Serial I/O2 port selection bit
Direction
register
Data bus
Port latch
Serial I/O2 clock output
Serial I/O2 external clock input
(5) Ports P04-P07,P1
Direction
register
Data bus
Port latch
(7) Port P21
Port XC switch bit
Direction
register
Data bus
Port latch
Sub-clock generating circuit input
(2) Port P01
P01/SOUT2 P-channel output disable bit
Serial I/O2 Transmit completion signal
Serial I/O2 port selection bit
Direction
register
Data bus
Port latch
Serial I/O2 output
(4) Port P03
SRDY2 output enable bit
Direction
register
Data bus
Port latch
Serial I/O2 ready output
(6) Port P20
Port XC switch bit
Direction
register
Data bus
Port latch
(8) Ports P22,P23
Data bus
Direction
register
Port latch
Oscillator
Port P21
Port XC switch bit
Fig. 10 Port block diagram (1)
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