HD64F2638F20J Datasheet, PDF (296/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 9 I/O Ports
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Table 9-5 Port 3 Pin Functions
Pin
Selection Method and Pin Functions
P35/SCK1/ Switches as follows according to combinations of ICCR0 ICE bit^*1 of IIC0, bit C/A of
SCL0^*1/IRQ5 SMR1, bits CKE0 and CKE1 of SCR1, and bit P35DDR.
When used as a SCL0 I/O pin, always be sure to clear the following bits to 0: bit C/A
of SMR1, and bits CKE0 and CKE1 of SCR1. The SCL0 output format is NMOS
open drain output, enabling direct bus driving.
ICE^*1
0
1
CKE1
0
1
0
C/A
0
1
—
0
CKE0
0
1
—
—
0
P35DDR
0
1
—
—
—
—
Pin function
P35
input
P35
output^*
SCK1 SCK1
output^* output^*
SCK1
input
SCL0
I/O
IRQ5 input
P34/RxD1/
SDA0^*1
Note: * When P35ODR = 1, it becomes NMOS open drain output.
In W mask-ROM versions, the output format is NMOS push-pull. However, it
becomes NMOS open drain output when P35ODR = 1.
Switches as follows according to combinations of ICCR0 ICE bit^*1 of IIC0, bit RE of
SCR1 and bit P34DDR. The SDA0 output format is NMOS open drain output,
enabling direct bus driving.
ICE^*1
0
1
RE
0
1
—
P34DDR
Pin function
0
P34 input
1
P34 output^*
—
RxD1 input
—
SDA0 I/O
Note: * When P34ODR = 1, it becomes NMOS open drain output.
In W mask-ROM versions, the output format is NMOS push-pull. However, it
becomes NMOS open drain output when P34ODR = 1.
Page 246 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010