M37544G Mitsubishi Electric, M37544G Datasheet - Page 16

• Manufacturer Part Number: M37544G
• Description: Single-Chip 8-Bit CMOS Microcomputer
• Manufacturer: Mitsubishi Electric

Fig. 16 Block diagram of ports (2)
16
(9) Ports P2
(11) Ports P3
(7) Port P1
Serial I/O mode selection bit
Data bus
Data bus
Data bus
*
S
When the TTL level is selected, there is no hysteresis characteristics.
P1
RDY
Serial I/O enable bit
0
, P1
output enable bit
3
0
–P2
Serial I/O ready output
4
2
, P3
, P3
5
Port latch
Direction
register
INT interrupt input
4
Port latch
7
Direction
register
Port latch
Direction
register
and P3
Pull-up control
7
A-D converter input
input level are switched to the CMOS/TTL level by the port P1P3 control register.
P3 input level
selection bit
Analog input pin
selection bit
*
(10) Ports P3
(8) Port P1
Data bus
Data bus
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Pulse output mode
4
0
–P3
Timer output
Port latch
Port latch
Direction
register
Direction
register
MITSUBISHI MICROCOMPUTERS
3
Pull-up control
CNTR
0
interrupt input
7544 Group