HD6432621 Hitachi, HD6432621 Datasheet - Page 306

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

9.7.4
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 6 and 7, and can be specified as on or off on an
individual bit basis.
In modes 6 and 7, if a pin is in the input state in accordance with the settings in the SCI’s SMR
and SCR, of pins IRQ4 and IRQ5, and in PCDDR, 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 9-14 summarizes the MOS input pull-up states.
Table 9-14 MOS Input Pull-Up States (Port C)
Pin States
Address output
Other than above
Legend:
OFF
ON/OFF : On when PCDDR = 0 and PCPCR = 1; otherwise off.
262
MOS Input Pull-Up Function
: MOS input pull-up is always off.
Power-On
Reset
OFF
Hardware
Standby Mode
OFF
Software
Standby Mode
OFF
ON/OFF
In Other
Operations
OFF
ON/OFF