Renesas H8S/2633 Series Hardware Manual page 456

In mode 7, if a pin is in the input state in accordance with the settings in the SCI's SCMR, SMR,
and SCR, and in DDR, setting the corresponding PAPCR 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 by a manual reset or in software standby mode.
Table 10A-11 summarizes the MOS input pull-up states.
Table 10A-11 MOS Input Pull-Up States (Port A)
Power-On
Pin States Reset
Address output or OFF
SCI output
Other than above
Legend:
OFF : MOS input pull-up is always off.
ON/OFF : On when PADDR = 0 and PAPCR = 1; otherwise off.
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Hardware Manual
Standby Mode Reset
OFF OFF
ON/OFF
Software In Other
Standby Mode Operations
OFF OFF
ON/OFF ON/OFF