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9.4.7
Pin Functions
Table 9.6 shows the port 5 pin functions.
The output type of SCL and SDA is open-drain, providing direct bus driving capability.
Table 9.6
Port 5 Pin Functions
Pin
Pin Functions and Selection Method
P57/SCL
The pin function depends on bit PCR57 in PCR5 and bit ICE in I2C.
ICE
PCR57
Pin function
The SCL output format is NMOS open drain and direct bus driving is enabled.
P56/SDA
The pin function depends on bit PCR56 in PCR5 and bit ICE in I2C.
ICE
PCR56
Pin function
The SDA output format is NMOS open drain and direct bus driving is enabled.
P55/WKP5/
The pin function depends on bit PCR55 in PCR5 and bit WKP5 in PMR5.
ADTRG
WKP5
PCR55
Pin function
P54/WKP4 to
The pin function depends on bit PCR5n in PCR5 and bit WKPn in PMR5.
P50/WKP0
WKPn
PCR5n
Pin function
(n = 4 to 0)
Note: * Don't care.
152
0
0
P57 input pin P57 output pin
0
0
P56 input pin P56 output pin
0
0
P55 input pin P55 output pin
0
0
P5n input pin P5n output pin
1
SCL I/O pin
1
SDA I/O pin
1
WKP5 input pin
ADTRG input pin
1
WKPn input pin
1
*
1
*
1
*
1
*
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