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 219 of 730
Aug 05, 2011
14.5.19 Drive Capacity Control Register 1 (DRR1)
Note:
1. Both high and low output are set to high drive capacity.
The set values in the DRR1 register are valid for pins used as output.
The DRR10 bit is used to select whether the drive capacity of the P4_3 output transistor is set to low or high.
This bit is used to select whether the drive capacity of the output transistor is set to low or high for one pin.
The DRR11 bit is used to select whether the drive capacity of the P4_4 to P4_7 output transistors is set to low or
high. This bit is used to select whether the drive capacity of the output transistors is set to low or high for four
pins.
The DRR12 bit is used to select whether the drive capacity of the P5_0 to P5_3 output transistors is set to low or
high. This bit is used to select whether the drive capacity of the output transistors is set to low or high for four
pins.
The DRR13 bit is used to select whether the drive capacity of the P5_4 to P5_7 output transistors is set to low or
high. This bit is used to select whether the drive capacity of the output transistors is set to low or high for four
pins.
The DRR14 bit is used to select whether the drive capacity of the P6_0 to P6_3 output transistors is set to low or
high. This bit is used to select whether the drive capacity of the output transistors is set to low or high for four
pins.
The DRR15 bit is used to select whether the drive capacity of the P6_4 to P6_7 output transistors is set to low or
high. This bit is used to select whether the drive capacity of the output transistors is set to low or high for four
pins.
Address 002CDh
Bit
b7b6
b5b4b3
b2b1b0
Symbol
After Reset
0
000
0000
Bit
Symbol
Bit Name
Function
R/W
b0
DRR10
P4_3 drive capacity
0: Low
R/W
b1
DRR11
P4_4 to P4_7 drive capacity
R/W
b2
DRR12
P5_0 to P5_3 drive capacity
R/W
b3
DRR13
P5_4 to P5_7 drive capacity
R/W
b4
DRR14
P6_0 to P6_3 drive capacity
R/W
b5
DRR15
P6_4 to P6_7 drive capacity
R/W
b6
DRR16
P7_0 to P7_3 drive capacity
R/W
b7
DRR17
P7_4 to P7_7 drive capacity
R/W