M37516F8HP Datasheet, PDF (9/12 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

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(9) Port P23
I²C-BUS interface enable bit
SDA/SCL pin selection bit
Direction
register
Data bus
Port latch
SCL output
SCL input
(11) Port P25
P-channel output disable bit
Serial I/O1 enable bit
Transmit enable bit
I²C-BUS interface enable bit
SDA/SCL pin selection bit
Direction
register
Data bus
Port latch
MITSUBISHI MICROCOMPUTERS
M37516F8HP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(10) Port P24
I²C-BUS interface enable bit
SDA/SCL pin selection bit
Serial I/O1 enable bit
Receive enable bit
Direction
register
Data bus
Port latch
SDA output
SDA input
Serial I/O1 input
(12) 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
SCL output
(13) 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
SCL input
Pulse output mode
Serial ready output
Timer output
CNTR0 interrupt
input
(15) Port P40
Direction
register
Data bus
Port latch
Pulse output mode
Timer output
CNTR1 interrupt input
Fig. 7 Port block diagram (2)
Serial I/O1 clock output
External clock input
(14) Ports P30–P37
Data bus
Direction
register
Port latch
A-D converter input
Analog input pin
selection bit
(16) Ports P41, P42
Data bus
Direction
register
Port latch
Interrupt input
9