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(6) Port P44
Serial I/O enable bit
Receive enalble bit
Direction
register
Data bus
Port latch
Pull-up control
Serial I/O input
MITSUBISHI MICROCOMPUTERS
38C8 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(7) Port P45
P45/TxD P-channel output disable bit
Serial I/O enable bit
Transmit enable bit
Direction
register
Databus
Port latch
Pull-up control
Serial I/O output
(8) Port P46
Serial I/O synchronous
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 clock output
Serial I/O clock input
Fig. 12 Port block diagram (2)
(9) 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
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