Datasheet

Section 8 I/O Ports
Rev. 2.00 Sep. 28, 2009 Page 243 of 870
REJ09B0429-0200
• PD0/LSCI
The pin function is switched as shown below according to the combination of the LSCIE bit in
HICR0 of the LPC and the PD0DDR bit.
LSCIE 0 1
PD0DDR 0 1 0
Pin function PD0 input pin PD0 output pin LSCI output pin
8.13.5 Input Pull-Up MOS
Port pins D5 to D0 have built-in input pull-up MOSs that can be controlled by software. This input
pull-up MOS can be used in any operating mode, and can be specified as on or off on a bit-by-bit
basis.
PDnDDR 0 1
PDnODR 1 0 X
PDn pull-up MOS ON OFF OFF
[Legend] n = 5 to 0, X: Don't care.
The input pull-up MOS is in the off state after a reset and in hardware standby mode. The prior
state is retained in software standby mode.
Table 8.7 summarizes the input pull-up MOS states.
Table 8.7 Port D Input Pull-Up MOS States
Reset
Hardware Standby
Mode
Software Standby
Mode
In Other Operations
Off Off On/Off On/Off
[Legend]
Off: Always off.
On/Off: On when PDDDR = 0 and PDODR = 1; otherwise off.