Pin States; Mos Input Pull-Up - Renesas H8 Series Hardware Manual

8.4.4

Pin States

Table 8.10 shows the port 3 pin states in each operating mode.
Table 8.10 Port 3 Pin States
Pins Reset
P3 /SO High-
2 1
impedance
P3 /SI
1 1
P3 /SCK
0 1
Note: * A high-level signal is output when the MOS pull-up is in the on state.
8.4.5

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
PUCR3
n
MOS input pull-up
Legend: * Don't care
Note: n = 2 to 0
Sleep Subsleep
Retains Retains
previous previous
state state
0
0
Off
Standby Watch
High- Retains
impedance *
previous
state
1
On
Rev. 6.00 Sep 12, 2006 page 185 of 526
Section 8 I/O Ports
Subactive Active
Functional Functional
1
*
Off
REJ09B0326-0600