HD404374 Datasheet, PDF (65/161 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip A/D Converter

HD404374/HD404384/HD404389/HD404082/HD404084 Series
Port mode register 3 (PMR3: $00B)
Bit
Read/Write
Initial value on reset
Bit name
3
W
0
PMR33
2
W
0
PMR32
1
W
0
PMR31
0
W
0
PMR30
PMR33
0
1
PMR30
0
1
R20/TOC pin mode selection
R20
TOC
PMR31
0
1
R21/SCK pin mode selection
R21
SCK
PMR32 R22/SI/SO pin mode selection
*
R22
0
SI
1
SO
* : Don't care
Figure 29 Port Mode Register 3 (PMR3: $00B)
Pull-Up MOS Control
Program-controllable pull-ups MOS are incorporated in all I/O pins.
On/off control of all pull-ups MOS is performed by bit 3 (MIS3) of the miscellaneous register (MIS: $005)
and the port data register (PDR) for each pin, enabling the pull-up MOS to be turned on or off
independently for each pin (table 22, figure 30).
Except for analog input multiplexed pins, the pull-up MOS on/off setting can be made independent of the
setting as an on-chip supporting module pin.
Rev.5.00, Sep.11.2003, page 65 of 161