HD64F2638F20J Datasheet, PDF (324/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 9 I/O Ports
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
9.7.5 MOS Input Pull-Up Function
Port B has an on-chip 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 reset, and in hardware standby mode.
The prior state is retained by a manual reset or in software standby mode.
Table 9-13 summarizes the MOS input pull-up states.
Table 9-13 MOS Input Pull-Up States (Port B)
Pin States
Reset
Hardware
Software
Standby Mode Standby Mode
Address output or
TPU output
OFF
OFF
OFF
Other than above
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
Page 274 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010