Port G - Renesas H8S/2100 Series Hardware Manual

7.2.16

Port G

(1) PG7/ExSCLB/ExIRQ15
The pin function is switched as shown below according to the combination of the register setting
of PTCNT1 and the PG7DDR bit. When the ISS15 bit in ISSR16 is set to 1 and the IRQ15E bit in
IER16 of the interrupt controller is set to 1, this pin can be used as the ExIRQ15 input pin.
Module
Name Pin Function
PTCNT1 ExSCLB
input/output
I/O port PG7 output
PG7 input
(initial setting)
Note: The output format for ExSCLB is NMOS output only, and direct bus drive is possible. When
this pin is used as the PG7 output pin, the output format is NMOS push-pull.
(2) PG6/ExSDAB/ExIRQ14
The pin function is switched as shown below according to the combination of the register setting
of PTCNT1 and the PG6DDR bit. When the ISS14 bit in ISSR16 is set to 1 and the IRQ14E bit in
IER16 of the interrupt controller is set to 1, this pin can be used as the ExIRQ14 input pin.
Module
Name Pin Function
PTCNT1 ExSDAB
input/output
I/O port PG6 output
PG6 input
(initial setting)
Note: The output format for ExSDAB is NMOS output only, and direct bus drive is possible. When
this pin is used as the PG6 output pin, the output format is NMOS push-pull.
PTCNT1
ExSCLB_OE
1
0
0
PTCNT1
ExSDAB_OE
1
0
0
Section 7 I/O Ports
Setting
I/O Port
PG7DDR

1
0
Setting
I/O Port
PG6DDR

1
0
Rev. 1.00 Apr. 28, 2008 Page 181 of 994
REJ09B0452-0100