Renesas RL78/G13 - Page 231

RL78/G13 CHAPTER 4 PORT FUNCTIONS
R01UH0146EJ0100 Rev.1.00 212
Sep 22, 2011
Table 4-11. Settings of Registers When Using Port 7
Pin Name
Name I/O
PM7× POM7×
Alternate Function Setting
Note 4
Remark
Input 1
− ×
P70
Output 0
SCK21/SCL21 output = 1
Note 1
Input 1
× ×
0 0 CMOS output
P71
Output
0 1
SDA21 output = 1
Note 1
N-ch O.D. output
Input 1
− ×
P72
Output 0
SO21 output = 1
Note 1
Input 1
− ×
P73
Output 0
SO01 output = 1
Note 2
Input 1
× ×
0 0
SDA01 output = 1
Note 2
CMOS output
P74
Output
0 1 N-ch O.D. output
Input 1
− ×
P75
Output 0
SCK01/SCL01 output = 1
Note 2
Input 1
− ×
P76
Output 0
×
Input 1
− ×
P77
Output 0
(TxD2 output = 1
Note 3
)
Notes 1. To use P70/KR0/SCK21/SCL21, P71/KR1/SI21/SDA21 or P72/KR2/SO21 as a general-purpose port, set
serial channel enable status register 1 (SE1), serial output register 1 (SO1) and serial output enable
register 1 (SOE1) to the default status.
2. To use P73 to P75 as a general-purpose port in 48- to 64-pin products, set serial channel enable status
register 0 (SE0), serial output register 0 (SO0) and serial output enable register 0 (SOE0) to the default
status.
3. To use P55 as a general-purpose port when PIOR1 = 1, set serial channel enable status register 1 (SE1),
serial output register 1 (SO1) and serial output enable register 1 (SOE1) to the default status.
4. The descriptions in parentheses indicate the case where PIORx = 1.
Remark ×: don’t care
PM7×: Port mode register 7
POM7×: Port output mode register 7
PIOR×: Peripheral I/O redirection register
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