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5.14.4
MOS Input Pull-Up Function
Port E 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 8-bit bus mode. MOS input pull-up can be specified as on or
off on a bit-by-bit basis.
In 8-bit bus mode, when a PEDDR bit is cleared to 0, setting the corresponding PEPCR 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 in software standby mode.
Table 5.31 summarizes the MOS input pull-up states.
Table 5.31
MOS Input Pull-Up States (Port E)
Mode
Reset
Hardware
Standby Mode
Software
Standby Mode
In Other
Operations
1, 2, 4 to 7
8-bit bus
Off
Off
On/Off
On/Off
16-bit bus
Off
Off
Legend:
Off:
MOS input pull-up is always off.
On/Off: On when PEDDR = 0 and PEPCR = 1; otherwise off.
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