D12320VF25V Datasheet, PDF (292/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 8 I/O Ports
Port A
PA3 (I/O)
PA2 (I/O)
PA1 (I/O)
PA0 (I/O)
Figure 8.8 Port A Pin Functions (Mode 7)
Note: * Modes 6 and 7 are not available in the ROMless versions.
8.6.4 MOS Input Pull-Up Function
Port A 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 cannot be used in modes 4 and 5. MOS
input pull-up can be specified as on or off on an individual bit basis.
When PADDR bits are cleared to 0, setting the corresponding PAPCR bits to 1 turns on the MOS
input pull-up for that pins.
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 8.10 summarizes the MOS input pull-up states.
Table 8.10 MOS Input Pull-Up States (Port A)
Modes
Reset
Hardware Standby Software Standby
Mode
Mode
6, 7^* PA3 to PA0 OFF
OFF
ON/OFF
4, 5
PA3 to PA0
OFF
Legend:
OFF: MOS input pull-up is always off.
ON/OFF: On when PADDR = 0 and PAPCR = 1; otherwise off.
In Other
Operations
ON/OFF
OFF
Note: * Modes 6 and 7 are not available in the ROMless versions.
Rev.7.00 Feb. 14, 2007 page 258 of 1108
REJ09B0089-0700