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Rev. 1.00, 05/04, page 131 of 544
• PB0/WUE0/LSMI
The pin function is switched as shown below according to the combination of the LSMIE bit in
HICR0 of the host interface (LPC) and the PB0DDR bit.
LSMIE 0 1
PB0DDR 0 1 0*
1
PB0 input pin PB0 output pin LSMI output pin Pin Function
WUE0 input pin*
2
, LSMI input pin*
2
Notes: 1. When the LSMIE bit in HICR0 is set to 1, the PB0DDR bit should be cleared to 0.
2. This pin can always be used as the WUE0 or LSMI input pin.
7.11.5 Port B Input Pull-Up MOS
Port B has an on-chip input pull-up MOS function that can be controlled by software. This input
pull-up MOS function can be specified as on or off on a bit-by-bit basis.
When a pin is designated as an on-chip peripheral module output pin, the input pull-up MOS is
always off.
Table 7.7 summarizes the input pull-up MOS states.
Table 7.7 Input Pull-Up MOS States (Port B)
Reset Hardware Standby Mode Software Standby Mode In Other Operations
Off Off On/Off On/Off
[Legend]
Off: Input pull-up MOS is always off.
On/Off: On when the pin is in the input state, PBDDR = 0, and PBODR = 1; otherwise off.