Port G - Renesas H8S/2100 Series Hardware Manual

Section 8 I/O Ports
8.2.16

Port G

(1) PG7/SCLB/ExIRQ15
The pin function is switched as shown below according to the combination of the ICE bit in ICCR
of IIC_2, the IIC2AS bit in IIC2BS 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. SCLD_EN in the following table is expressed by the following
logical expression.
SCLD_EN = ICE·IIC2BS·IIC2AS
SCLD_EN
PG7DDR
Pin function
Note: The output format for SCLD 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/SDAD/ExIRQ14
The pin function is switched as shown below according to the combination of the ICE bit in ICCR
of IIC_2, the IIC2AS bit in IIC2BS 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. SDAD_EN in the following table is expressed by the following
logical expression.
SDAD_EN = ICE·IIC2BS·IIC2AS
SDAD_EN
PG6DDR
Pin function
Note: The output format for SDAD 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.
Rev. 1.00 May 09, 2008 Page 188 of 954
REJ09B0462-0100
0
0
PG7 input pin
0
0
PG6 input pin
1
PG7 output pin
ExIRQ15 input pin
1
PG6 output pin
ExIRQ14 input pin
1

SCLD I/O pin
1

SDAD I/O pin