h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 248

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 8 I/O Ports
8.4.4
Port 3 has a built-in MOS input pull-up function that can be controlled by software. This MOS
input pull-up function can be used in modes 2 and 3 (when EXPE = 0), and can be specified as on
or off on a bit-by-bit basis.
When a P3DDR bit is cleared to 0 in mode 2 or 3 (when EXPE = 0), setting the corresponding
P3PCR 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 and in hardware standby mode. The
prior state is retained in software standby mode.
Table 8.7 summarizes the MOS input pull-up states.
Table 8.7
Mode
1, 2 and 3 (EXPE = 1) Off
2, 3 (EXPE = 0)
Legend:
Off:
On/Off: On when P3DDR = 0 and P3PCR = 1; otherwise off.
Rev. 3.00 Jan 18, 2006 page 220 of 1044
REJ09B0280-0300
MOS input pull-up is always off.
MOS Input Pull-Up Function
MOS Input Pull-Up States (Port 3)
Figure 8.11 Port 3 Pin Functions (Modes 2 and 3 (EXPE = 0))
Port 3
Off
Reset
P37 (I/O)/HDB7 (I/O)/SERIRQ (I/O)
P36 (I/O)/HDB6 (I/O)/LCLK (Input)
P35 (I/O)/HDB5 (I/O)/LRESET (Input)
P34 (I/O)/HDB4 (I/O)/LFRAME (Input)
P33 (I/O)/HDB3 (I/O)/LAD3 (I/O)
P32 (I/O)/HDB2 (I/O)/LAD2 (I/O)
P31 (I/O)/HDB1 (I/O)/LAD1 (I/O)
P30 (I/O)/HDB0 (I/O)/LAD0 (I/O)
Hardware
Standby Mode
Off
Off
Software
Standby Mode
Off
On/Off
In Other
Operations
Off
On/Off