MITSUBISHI MICROCOMPUTERS
3822 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
(8) Port P4
6
(7) Port P4
5
Serial I/O clock-
synchronized selection bit
Serial I/O enable bit
Pull-up control
Pull-up control
P4
5
/T
x
D P-channel output disable bit
Serial I/O enable bit
Transmit enable bit
Serial I/O mode selection bit
Serial I/O enable bit
Direction register
Direction register
Data bus
Port latch
Data bus
Port latch
Serial I/O output
Serial I/O clock output
Serial I/O clock input
(9) Port P4
7
(10) Ports P52, P53
Pull-up control
Pull-up control
Serial I/O mode selection bit
Serial I/O enable bit
S
RDY output enable bit
Direction register
Direction register
Data bus
Port latch
Data bus
Port latch
Real time port control bit
Data for real time port
Serial I/O ready output
(11) Port P5
4
(12) Ports P55, P5
7
Pull-up control
Pull-up control
Direction register
Direction register
Data bus
Port latch
Data bus
Port latch
Timer X operating mode bit
(Pulse output mode selection)
Timer output
CNTR1 interrupt input
A-D trigger interrupt input
CNTR0 interrupt input
Fig. 16 Port block diagram (2)
20
MITSUBISHI [ Mitsubishi Group ]
