Mos Input Pull-Up Function - Renesas H8S/2319 series Hardware Manual

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 after 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
6, 7 *
PA3 to PA0 OFF
4, 5 PA3 to PA0
Legend:
OFF: MOS input pull-up is always off.
ON/OFF: On when PADDR = 0 and PAPCR = 1; otherwise off.
Note: * Modes 6 and 7 are not available in the ROMless versions.
Port A
Figure 8-8 Port A Pin Functions (Mode 7)
Hardware Standby
Reset Mode
OFF
PA3 (I/O)
PA2 (I/O)
PA1 (I/O)
PA0 (I/O)
Software Standby
Mode
ON/OFF
OFF
Rev. 5.00, 12/03, page 253 of 1088
In Other
Operations
ON/OFF
OFF