h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 295

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

9.9.4
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 of PFCR, the LCD
driver LPCR, and DDR, setting PBPCR to 1 turns on MOS input pull-up.
In mode 7, if a pin is in the input state in accordance with the settings of the LCD driver LPCR
and DDR, setting PBPCR to 1 turns on MOS input pull-up.
The MOS input pull-up function is in the off state after a reset, and in hardware standby mode.
The prior state is retained by a manual reset or in software standby mode.
Table 9.18 summarizes the MOS input pull-up states.
Table 9.18 MOS Input Pull-Up States (Port B)
Legend:
OFF:
ON/OFF: On when PBDDR = 0 and PBPCR = 1; otherwise off.
Pin States
Address output or
LCD output
Other than above
MOS Input Pull-Up Function
MOS input pull-up is always off.
Reset
OFF
Hardware
Standby Mode
OFF
Rev. 5.00 Sep 22, 2005 page 269 of 1136
Software
Standby Mode
OFF
ON/OFF
Section 9 I/O Ports
In Other
Operations
OFF
ON/OFF
REJ09B0257-0500