H8S-2655 Datasheet, PDF (443/1091 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcomputer

Section 9 I/O Ports
9.12.4 MOS Input Pull-Up Function
Port E 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, 2, 4 to 6 when 8-bit bus mode is selected, or in
mode 3 or 7, and can be specified as on or off on an individual bit basis.
When a PEDDR bit is cleared to 0 in mode 1, 2, 4 to 6 when 8-bit bus mode is selected, or in
mode 3 or 7, setting the corresponding PEPCR 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 power-on reset, and in hardware standby
mode. The prior state is retained after a manual reset, and in software standby mode.
Table 9.22 summarizes the MOS input pull-up states.
Table 9.22 MOS Input Pull-Up States (Port E)
Modes
Power-On Hardware Manual
Reset Standby Mode Reset
3, 7
OFF
1, 2, 4 to 6 8-bit bus
16-bit bus
Legend:
OFF: MOS input pull-up is always off.
ON/OFF: On when PEDDR = 0 and PEPCR = 1; otherwise off.
Software
Standby Mode
ON/OFF
OFF
In Other
Operations
Rev. 5.00 Sep 14, 2006 page 415 of 1060
REJ09B0331-0500