Table of Contents
Advertisement
Port Pull-Up Control Register 1 (PUCR1)
PUCR1 controls whether the MOS pull-up of each port 1 pin is on or off. When a PCR1 bit is
cleared to 0, setting the corresponding PUCR1 bit to 1 turns on the MOS pull-up for the
corresponding pin, while clearing the bit to 0 turns off the MOS pull-up.
Upon reset, PUCR1 is initialized to H'00.
H8/3857 Group
Bit
PUCR1
Initial value
Read/Write
R/W
H8/3854 Group
Bit
PUCR1
Initial value
Read/Write
R/W
In the H8/3854 Group, bits 6, 4, and 3 are reserved, and must always be set to 0.
7
6
5
PUCR1
PUCR1
7
6
0
0
0
R/W
R/W
7
6
5
⎯
PUCR1
7
0
0
0
⎯
R/W
4
3
PUCR1
PUCR1
5
4
3
0
0
R/W
R/W
4
3
⎯
⎯
5
0
0
⎯
⎯
Rev.3.00 Jul. 19, 2007 page 175 of 532
8. I/O Ports
2
1
PUCR1
PUCR1
PUCR1
2
1
0
0
R/W
R/W
2
1
PUCR1
PUCR1
PUCR1
2
1
0
0
R/W
R/W
REJ09B0397-0300
0
0
0
R/W
0
0
0
R/W
Advertisement
Table of Contents
