h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 284

• 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
8.11.4
Port A 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 any operating mode, and can be specified as on or off on a
bit-by-bit basis.
When a PADDR bit is cleared to 0, setting the corresponding PAODR bit to 1 turns on the MOS
input pull-up for that pin. The MOS input pull-up for pins PA7 to PA4 is always off when IICS is
set to 1. When the keyboard buffer control pin function is selected for pins PA7 to PA2, 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 8.22 summarizes the MOS input pull-up states.
Table 8.22 MOS Input Pull-Up States (Port A)
Mode
1 to 3
Legend:
Off:
On/Off: On when PADDR = 0 and PAODR = 1; otherwise off.
Rev. 3.00 Jan 18, 2006 page 256 of 1044
REJ09B0280-0300
MOS input pull-up is always off.
MOS Input Pull-Up Function
Reset
Off
Hardware
Standby Mode
Off
Software
Standby Mode
On/Off
In Other
Operations
On/Off