h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 293

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

8.12.4
Port B 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 1 to 3 (EXPE = 1) with the ABW bit in WSCR set to
1, and in modes 2 and 3 (EXPE = 0), and can be specified as on or off on a bit-by-bit basis.
When a PBDDR bit is cleared to 0, setting the corresponding PBODR bit to 1 turns on the MOS
input pull-up for that pin. When a pin is designated as an on-chip supporting module output pin,
the MOS input pull-up is always off.
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 8.25 summarizes the MOS input pull-up states.
Table 8.25 MOS Input Pull-Up States (Port B)
Legend:
Off:
On/Off: On when PBDDR = 0 and PBODR = 1; otherwise off.
Mode
1, 2, 3 (EXPE = 1) with
ABW in WSCR = 0
1, 2, 3 (EXPE = 1) with
ABW in WSCR = 1, and
2, 3 (EXPE = 0)
MOS input pull-up is always off.
MOS Input Pull-Up Function
Off
Off
Reset
Hardware
Standby Mode
Off
Off
Rev. 3.00 Jan 18, 2006 page 265 of 1044
Software
Standby Mode
Off
On/Off
Section 8 I/O Ports
REJ09B0280-0300
In Other
Operations
Off
On/Off