HD64F2638F20J Datasheet, PDF (342/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 9 I/O Ports
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
9.10.4 MOS Input Pull-Up Function
Port E has an on-chip MOS input pull-up function that can be controlled by software. This MOS
input pull-up function can be used in modes 4 to 6 when 8-bit bus mode is selected, or in mode 7,
and can be specified as on or off on an individual bit basis.
When a PEDDR bit is cleared to 0 in modes 4 to 6 when 8-bit bus mode is selected, or in mode 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 reset, and in hardware standby mode.
The prior state is retained in software standby mode.
Table 9-19 summarizes the MOS input pull-up states.
Table 9-19 MOS Input Pull-Up States (Port E)
Modes
Reset
Hardware
Standby Mode
Software
Standby Mode
7
OFF
OFF
ON/OFF
4 to 6 8-bit bus
16-bit bus
OFF
Legend:
OFF: MOS input pull-up is always off.
ON/OFF: On when PEDDR = 0 and PEPCR = 1; otherwise off.
In Other
Operations
ON/OFF
OFF
Page 292 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010