Renesas H8S Series Hardware Manual page 225

IICENABLE
CKE1
C/A
CKE0
P42DDR 0
Pin function P42 input
pin
Note: To use this pin as the SDA1 input/output pin, clear the SDA1AS and SDA1BS bits in
PTCNT1, CKE1 and CKE0 bits in SCR of SCI_2, and C/A bit in SMR to 0. The output
format for SDA1 is NMOS output only, and direct bus drive is possible. When this pin is
used as the P42 output pin or SCK2 output pin, the output format is NMOS push-pull output.
• P41/TMO0/RxD2/DCLKRUN
The pin function is switched as shown below according to the combination of the OS3 to OS0
bits in TCSR of TMR_0, RE bit in SCR of SCI_2, LPCS bit in PTCNT2 and the P41DDR bits.
LPCS
OS3 to OS0
RE
P41DDR
Pin function P41 input pin
Note: To use this pin as the TMO0 output pin, clear the RE bit in SCR of SCI_2 to 0.
• P40/TMCI0/TxD2/DSERIRQ
The pin function is switched as shown below according to the combination of the TE bit in
SCR of SCI_2, LPCS bit in PTCNT2, and the P40DDR bits. When the TMI0S bit in PTCNT0
is cleared to 0 and the external clock is selected by the CKS2 to CKS0 bits in TCR of TMR_0,
this bit is used as the TMCI0 input pin.
LPCS
TE
P40DDR
Pin function
0
0
0
1
P42 output SCK2 output
pin
ExIRQ7 input pin/TMRI0 input pin
All 0
0
0 1
P41 output pin RxD2 input pin
0
0
P40 input pin P40 output pin
0
1

1
 
SCK2 output
pin pin
0
One bit is set as 1
1

TMO0 output pin
0
1

1
TxD2 output pin
TMCI0 input pin
Rev. 3.00 Jul. 14, 2005 Page 177 of 986
Section 8 I/O Ports
1


 
SCK2 input SDA1 input/output
pin pin
1


0
 
DCLKRUN
input/output pin
1


DSERIRQ input/output pin
REJ09B0098-0300
1
0
0
0