8. I/O Ports
Rev.3.00 Jul. 19, 2007 page 182 of 532
REJ09B0397-0300
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
0
1
PUCR1
n
0
1
*
MOS input pull-up
Off
On
Off
Legend:
*
Don't care
Notes:
H8/3857 Group: n = 7 to 0
H8/3854 Group: n = 7, 5, 2 to 0
8.3 Port
2
Some port 2 functions differ between the H8/3857 Group and the H8/3854 Group.
The UD function multiplexed with the P2
1
pin is provided only in the H8/3857 Group, and not in
the H8/3854 Group.
POF1 in PMR2 is also a function of the H8/3857 Group only.
8.3.1 Overview
Port 2 is an 8-bit I/O port. The H8/3857 Group port 2 pin configuration is shown in figure 8.2 (a),
and the H8/3854 Group port 2 pin configuration in figure 8.2 (b).
P2
P2
P2
P2
P2
P2
P2 /UD
P2 /
IRQ
/
ADTRG
7
6
5
4
3
2
1
0
Port 2
4
Figure 8.2 (a) H8/3857 Group Port 2 Pin Configuration
Summary of Contents for F-ZTAT H8 Series
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