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Section 8 I/O Ports
8.2.5
MOS Input Pull-Up
Port 1 has a built-in MOS input pull-up function that can be controlled by software. When a
PCR1 bit is cleared to 0, setting the corresponding PUCR1 bit to 1 turns on the MOS input pull-up
for that pin. The MOS input pull-up function is in the off state after a reset.
PCR1
n
PUCR1
n
MOS input pull-up
Rev. 6.00 Aug 04, 2006 page 212 of 680
REJ09B0145-0600
0
0
Off
0
1
On
1
*
Off
(n = 7 to 0)
*: Don't care
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