
MB90420G/425G Series
DS07-13711-5E
33
■ PERIPHERAL FUNCTIONS
1.
I/O Ports
The I/O ports function is to send data from the CPU to be output from I/O pins and load input signals at the I/O
pins into the CPU, according to the port data register (PDR) . Port input/output at I/O pins can be controlled in
bit units by the port direction register (DDR) as required. The following list shows each of the functions as well
as the shared peripheral function for each port.
Port 0 : General purpose I/O port, shared with peripheral functions (external interrupt/UART/PPG)
Port 1 : General purpose I/O port, shared with peripheral functions (PPG/reload timer/watch timer/ICU)
Port 3 : General purpose I/O port, shared with peripheral functions (LCD)
Port 4 : General purpose I/O port, shared with peripheral functions (LCD)
Port 5 : General purpose I/O port, shared with peripheral functions (External interrupt/CAN/SG)
Port 6 : General purpose I/O port, shared with peripheral functions (A/D converter)
Port 7 : General purpose I/O port, shared with peripheral functions (Stepping motor controller)
Port 8 : General purpose I/O port, shared with peripheral functions (Stepping motor controller)
Port 9 : General purpose I/O port, shared with peripheral functions (LCD)
(1) List of Functions
(Continued)
Port
Pin name
Input
format
Output for-
mat
Function
Port 0
P00/SIN0/INT4 to
P07/PPG1
CMOS
(hysteresis)
(Automotive level*)
CMOS
General purpose I/O port
Peripheral function
Port 1
P10/PPG2 to
P15/IN0
General purpose I/O port
Peripheral function
Port 3
P36/SEG12,
P37/SEG13
General purpose I/O port
Peripheral function
Port 4
P40/SEG14 to
P47/SEG21
General purpose I/O port
Peripheral function
Port 5
P50/INT0 to
P57/SGA
General purpose I/O port
Peripheral function
Port 6
P60/AN0 to
P67/AN7
Analog
CMOS
(hysteresis)
(Automotive level*)
General purpose I/O port
Peripheral function
Port 7
P70/PWM1P0 to
P77/PWM2M1
CMOS
(hysteresis)
(Automotive level*)
General purpose I/O port
Peripheral function
Port 8
P80/PWM1P2 to
P87/PWM2M3
General purpose I/O port
Peripheral function
Port 9
P90/SEG22,
P91/SEG23
General purpose I/O port
Peripheral function