HD64F2149 Datasheet, PDF (299/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

8.15.3 Pin Functions
The port E and port F pins have only one special function.
8.15.4 MOS Input Pull-Up Function
Port E and port F have a built-in MOS input pull-up function that can be controlled by software.
This MOS input pull-up function can be switched as on or off on a bit-by-bit basis.
When a PEDDR or PFDDR bit is cleared to 0, setting the corresponding PEODR or PFODR bit to
1 will turn on the MOS input pull-up for that pin.
The MOS input pull-up function is off after a reset and in hardware standby mode. The prior state
is retained when in software standby mode.
Table 8.30 is a summary of the MOS input pull-up states.
Table 8.30 MOS Input Pull-Up States (Port E and port F)
Mode
Reset
Hardware
Standby Mode
Software
Standby Mode
Other
Operations
1, 2, 3
Off
Off
On/Off
On/Off
Legend:
Off: MOS input pull-up is always off.
On/Off: On when PEDDR = 0 and PEODR = 1 (PFDDR = 0 and PFODR = 1); otherwise off.
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