Section 8 I/O Ports
Rev. 7.00 Mar 10, 2005 page 208 of 652
REJ09B0042-0700
8.3.4 Pin States
Table 8.7 shows the port 3 pin states in each operating mode.
Table 8.7 Port 3 Pin States
Pins Reset Sleep Subsleep Standby Watch Subactive Active
P3
7
/AEVL
P3
6
/AEVH
P3
5
P3
4
P3
3
P3
2
/TMOFH
P3
1
/TMOFL
P3
0
/UD
High-
impedance
Retains
previous
state
Retains
previous
state
High-
impedance
*
Retains
previous
state
Functional Functional
Note: * A high-level signal is output when the MOS pull-up is in the on state.
8.3.5 MOS Input Pull-Up
Port 3 has a built-in MOS input pull-up function that can be controlled by software. When a
PCR3 bit is cleared to 0, setting the corresponding PUCR3 bit to 1 turns on the MOS pull-up for
that pin. The MOS pull-up function is in the off state after a reset.
PCR3
n
001
PUCR3
n
01*
MOS input pull-up Off On Off
(n = 7 to 0)
*: Don’t care
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