
R8C/14 Group, R8C/15 Group 17. Programmable I/O Ports
Rev.2.10 Jan 19, 2006 Page 185 of 253
REJ09B0164-0210
Figure 17.7 PUR0 and PUR1 Registers
Figure 17.8 DRR Register
Pull-Up Control Register 0
Symbol Address After Reset
PUR0
00FCh 00XX0000b
Bit Symbol Bit Name Function RW
NOTES :
1.
RW
When this bit is set to “1” (pulled up), the pin w hose direct bit is set to “0” (input mode) is pulled up.
PU07
PU06
RW
RW
RWP1_4 to P1_7 pull-up
(1)
PU02
—
(b5-b4)
PU03
b3 b2 b1
0
b0
0
(b1-b0)
b7 b6 b5 b4
P1_0 to P1_3 pull-up
(1)
Reserved Bit
P3_4 to P3_5 and P3_7 pll-up
(1)
—
P3_3 pull-up
(1)
RW0 : Not pulled up
1 : Pulled up
Nothing is assigned. When w rite, set to “0”.
When read, its content is indeterminate.
0 : Not pulled up
1 : Pulled up
Set to “0”
Pull-up Control Register 1
Symbol Address After Reset
PUR1
00FDh XXXXXX0Xb
Bit Symbol Bit Name Function RW
NOTES :
1.
—
PU11
P4_5 pull-up
(1)
0 : Not pulled up
1 : Pulled up
RW
—
(b7-b2)
Nothing is assigned. When write, set to “0”.
When read, its content is indeterminate.
—
(b0)
Nothing is assigned. When write, set to “0”.
When read, its content is indeterminate.
b7 b6 b5 b4 b0
—
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.
b3 b2 b1
Port P1 Drive Capacity Control Register
Symbol Address After Reset
DRR
00FEh 00h
Bit Symbol Bit Name Function RW
RW
Set P1 N-channel output transistor drive
capacity
0 : Low
1 : High
Reserved Bit(b7-b4)
RWP1_0 Drive Capacity
DRR3 P1_3 Drive Capacity RW
RW
RWP1_2 Drive Capacity
DRR1 P1_1 Drive Capacity
b1 b0
0
b3 b2
DRR0
DRR2
Set to “0”
b7 b6 b5 b4
000
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