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10.13.3 Pin Functions
Port G is used also as external interrupt input pins (IRQ6, IRQ7) and bus control signal output
pins (CS0 to CS3, CAS, OE). The pin functions are different between modes 4 and 6, and
mode 7. Table 10-23 shows the port G pin functions.
Table 10-23 Port G Pin Functions
Pin
Selection Method and Pin Functions
PG4/CS0
The pin function is switched as shown below according to the operating mode and
bit PG4DDR.
Operating
Mode
PG4DDR
Pin function
PG3/CS1
The pin function is switched as shown below according to the operating mode and
bit PG3DDR.
Operating
Mode
PG3DDR
Pin function
PG2/CS2
The pin function is switched as shown below according to the operating mode and
bit PG2DDR.
Operating
Mode
PG2DDR
Pin function
400
Modes 4 to 6
0
CS0 output pin
PG4 input pin
Modes 4 to 6
0
CS1 output pin
PG3 input pin
Modes 4 to 6
0
CS2 output pin
PG2 input pin
1
0
PG4 input pin
1
0
PG3 input pin
1
0
PG2 input pin
Mode 7
1
PG4 output pin
Mode 7
1
PG3 output pin
Mode 7
1
PG2 output pin
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