Renesas R8C/18 Series Hardware Manual page 49

R8C/18 Group, R8C/19 Group
Pull-Up Control Register 0
b7 b6 b5 b4 b3 b2 b1 b0
0 0
NOTE:
1. When this bit is set to 1 (pulled up), the pin w hose direction bit is set to 0 (input mode) is pulled up.
Pull-Up Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
NOTE:
1. When the PU11 bit is set to 1 (pulled up), and the PD4_5 bit is set to 0 (input mode), the P4_5 pin is pulled up.
Figure 6.7 Registers PUR0 and PUR1
Port P1 Drive Capacity Control Register
b7 b6 b5 b4 b3 b2 b1 b0
0 0 0 0
Figure 6.8 DRR Register
Rev.1.30 Apr 14, 2006
REJ09B0222-0130
Symbol Address
00FCh
PUR0
Bit Symbol Bit Name
(b1-b0) Reserved bits
PU02 P1_0 to P1_3 pull-up
PU03 P1_4 to P1_7 pull-up
— Nothing is assigned. If necessary, set to 0.
(b5-b4) When read, the content is undefined.
(1)
PU06 P3_3 pull-up
P3_4 to P3_5, and P3_7 pll-up
PU07
Symbol Address
00FDh
PUR1
Bit Symbol Bit Name
— Nothing is assigned. If necessary, set to 0.
(b0) When read, the content is undefined.
(1)
P4_5 pull-up
PU11
— Nothing is assigned. If necessary, set to 0.
(b7-b2) When read, the content is 0.
Symbol Address
00FEh
DRR
Bit Symbol Bit Name
DRR0 P1_0 drive capacity
DRR1 P1_1 drive capacity
DRR2 P1_2 drive capacity
DRR3 P1_3 drive capacity
(b7-b4) Reserved bits
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Set to 0.
(1)
0 : Not pulled up
1 : Pulled up
(1)
0 : Not pulled up
1 : Pulled up
(1)
0 : Not pulled up
1 : Pulled up
Set P1 N-channel output transistor drive
capacity.
0 : Low
1 : High
Set to 0.
6. Programmable I/O Ports
After Reset
00XX0000b
Function
After Reset
XXXXXX0Xb
Function
After Reset
00h
Function
RW
RW
RW
RW
—
RW
RW
RW
—
RW
—
RW
RW
RW
RW
RW
RW