Technical information

MITSUBISHI MICROCOMPUTERS
3806 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
14
Fig. 5 Port block diagram (single-chip mode) (2)
(14) Ports P74 – Port P77
Direction register
Data bus
Port latch
(13) Port P73
Direction register
Data bus
Port latch
Serial I/O2 ready output
SRDY2 output enable bit
Serial I/O2
synchronous clock selection bit
Direction register
Data bus
Port latch
Serial I/O2 clock output
Serial I/O2 port selection bit
(12) Port P72
(9) Port P6
Direction register
Data bus
Port latch
A-D conversion input
Analog input pin selection bit
(10) Port P70
Direction register
Data bus
Port latch
Serial I/O2 input
(11) Port P71
Direction register
Data bus
Port latch
Serial I/O2 output
Serial I/O2 port selection bit
Serial I/O2
transmit completion signal
Serial I/O2
external
clock input