Hitachi H8S/2678 Series Reference Manual page 280

5.12.4 MOS Input Pull-Up Function
Port C 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 4 and 7. MOS input pull-up can be specified as on or
off on a bit-by-bit basis.
In modes 4 and 7, when a PCDDR bit is cleared to 0, setting the corresponding PCPCR 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 5.25 summarizes the MOS input pull-up states.
Table 5.25 MOS Input Pull-Up States (Port C)
Mode
1, 2, 5, 6
4, 7
Legend:
Off: MOS input pull-up is always off.
On/Off: On when PCDDR = 0 and PCPCR = 1; otherwise off.
Hardware
Reset Standby Mode
Off Off
Software
Standby Mode
Off
On/Off
In Other
Operations
Off
On/Off
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