HD6432633 Datasheet, PDF (537/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

10B.8.4 MOS Input Pull-Up Function
Port B has a built-in MOS input pull-up function that can be controlled by software. MOS input
pull-up can be specified as on or off on an individual bit basis.
In modes 4 to 6, if a pin is in the input state in accordance with the settings in PFCR, in the TPU’s
TIOR, and in DDR, setting the corresponding PBPCR bit to 1 turns on the MOS input pull-up for
that pin.
In mode 7, if a pin is in the input state in accordance with the settings in the TPU’s TIOR and in
DDR, setting the corresponding PBPCR 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 10B-13 summarizes the MOS input pull-up states.
Table 10B-13 MOS Input Pull-Up States (Port B)
Pin States
Power-On Hardware
Manual Software
Reset
Standby Mode Reset
Standby Mode
Address output or
TPU output
OFF
OFF
OFF
OFF
Other than above
ON/OFF ON/OFF
Legend:
OFF : MOS input pull-up is always off.
ON/OFF : On when PBDDR = 0 and PBPCR = 1; otherwise off.
In Other
Operations
OFF
ON/OFF
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