
R8C/38T-A Group
14. I/O Ports
Under development Preliminary document
Specifications in this document are tentative and subject to change.
R01UH0241EJ0010 Rev.0.10
Page 217 of 730
Aug 05, 2011
14.5.16 Port P1 Drive Capacity Control Register (P1DRR)
Note:
1. Both high and low output are set to high drive capacity.
The P1DRR register is used to select whether the drive capacity of the P1 output transistor is set to low or high.
The P1DRRj bit (j = 0 to 7) is used to select whether the drive capacity of the output transistor is set to low or
high for each pin.
The set values in the P1DRR register are valid for pins used as output.
14.5.17 Port P2 Drive Capacity Control Register (P2DRR)
Note:
1. Both high and low output are set to high drive capacity.
The P2DRR register is used to select whether the drive capacity of the P2 output transistor is set to low or high.
The P2DRRj bit (j = 0 to 7) is used to select whether the drive capacity of the output transistor is set to low or
high for each pin.
The set values in the P2DRR register are valid for pins used as output.
Address 002C8h
Bit
b7b6
b5b4b3
b2b1b0
After Reset
0
000
0000
Bit
Symbol
Bit Name
Function
R/W
b0
P1DRR0 P1_0 drive capacity
0: Low
R/W
b1
P1DRR1 P1_1 drive capacity
R/W
b2
P1DRR2 P1_2 drive capacity
R/W
b3
P1DRR3 P1_3 drive capacity
R/W
b4
P1DRR4 P1_4 drive capacity
R/W
b5
P1DRR5 P1_5 drive capacity
R/W
b6
P1DRR6 P1_6 drive capacity
R/W
b7
P1DRR7 P1_7 drive capacity
R/W
Address 002C9h
Bit
b7b6
b5b4b3
b2b1b0
After Reset
0
000
0000
Bit
Symbol
Bit Name
Function
R/W
b0
P2DRR0 P2_0 drive capacity
0: Low
R/W
b1
P2DRR1 P2_1 drive capacity
R/W
b2
P2DRR2 P2_2 drive capacity
R/W
b3
P2DRR3 P2_3 drive capacity
R/W
b4
P2DRR4 P2_4 drive capacity
R/W
b5
P2DRR5 P2_5 drive capacity
R/W
b6
P2DRR6 P2_6 drive capacity
R/W
b7
P2DRR7 P2_7 drive capacity
R/W