h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 290

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 9 I/O Ports
9.8.4
Port A 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 LPCR,
and in DDR, setting the corresponding PAPCR 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 LPCR 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 reset, and in hardware standby mode.
The prior state is retained in software standby mode.
Table 9.15 summarizes the MOS input pull-up states.
Table 9.15 MOS Input Pull-Up States (Port A)
Legend:
OFF:
ON/OFF: On when PADDR = 0 and PAPCR = 1; otherwise off.
Rev. 5.00 Sep 22, 2005 page 264 of 1136
REJ09B0257-0500
Pin States
Address output or
SCI output
Other than above
MOS Input Pull-Up Function
MOS input pull-up is always off.
Reset
OFF
Hardware
Standby Mode
OFF
Software
Standby Mode
OFF
ON/OFF
In Other
Operations
OFF
ON/OFF