Renesas H8S/2100 Series Hardware Manual page 204

Section 8 I/O Ports
(4) PB4/DSR/FSIDO
The pin function is switched as shown below according to the combination of the FSIE bit in
FSICR1 of FSI and the PB4DDR bit.
FSIE
PB4DDR
Pin function
(5) PB3/DCD/PWMU1B
The pin function is switched as shown below according to the combination of the PWMIE bit in
PWM of PWMU_B and the PB3DDR bit.
PB3DDR
PWM1E
Pin function
(6) PB2/RI/PWMU0B
The pin function is switched as shown below according to the combination of the PWM0E bit in
PWMOUTCR of PWMU_B and the PB2DDR bit.
PB2DDR
PWM0E
Pin function
Rev. 1.00 May 09, 2008 Page 178 of 954
REJ09B0462-0100
0
0
PB4 input pin
0

PB3 input pin
0

PB2 input pin
1
PB4 output pin
DSR input pin
1
0
PB3 output pin
DCD input pin
1
0
PB2 output pin
RI input pin
1

FSIDO output pin
1
PWMU1B output pin
1
PWMU0B output pin