Rev. 2.0, 11/00, page 252 of 1037
(4) P24/SCL
P24/SCL2 is switched as shown below according to the ICE bit in the I
2
C bus control register
and the PCR24 bit in PCR2.
ICE
PCR24
Pin Function
0
P24 input pin
0
1
P24 output pin
1
*
SCL I/O pin
Note:
*
Don't care.
(5) P23/SDA
P23/SDA is switched as shown below according to the ICE bit in the I
2
C bus control register
and the PCR23 bit in PCR2.
ICE
PCR23
Pin Function
0
P23 input pin
0
1
P23 output pin
1
*
SDA I/O pin
Note:
*
Don't care.
(6) P22/SCK1
P22/SCK1 is switched as shown below according to the PCR22 bit in PCR2, the C/
$ bit in
SMR, and the CKE1 and CKE0 bits in SCR.
CKE1
C/
$$
CKE0
PCR22
Pin Function
0
P22 input pin
0
1
P22 output pin
0
1
0
1
SCK1 output pin
1
*
*
*
SCK1 input pin
Note:
*
Don't care.
(7) P21/SO1
P21/SO1 is switched as shown below according to the PCR21 bit in PCR2 and the TE bit in
SCR.
Summary of Contents for Hitachi H8S/2191
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