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62 AMD Geode™ SC2200 Processor Data Book
Signal Definitions
32580B
3.4.8 Low Pin Count (LPC) Bus Interface Signals
Signal Name Ball No. Type Description Mux
LAD3 L29 I/O LPC Address-Data. Multiplexed command, address,
bidirectional data, and cycle status.
GPIO35
LAD2 L30 GPIO34
LAD1 L31 GPIO33
LAD0 M28 GPIO32
LDRQ# L28 I LPC DMA Request. Encoded DMA request for LPC
interface.
Note: If LDRQ# function is selected but not used, tie
LDRQ# high.
GPIO36
LFRAME# K31 O LPC Frame. A low pulse indicates the beginning of a
new LPC cycle or termination of a broken cycle.
GPIO37
LPCPD# K28 O LPC Power-Down. Signals the LPC device to prepare for
power shut-down on the LPC interface.
GPIO38/IRRX2
SERIRQ J31 I/O Serial IRQ. The interrupt requests are serialized over a
single signal, where each IRQ level is delivered during a
designated time slot.
Note: If SERIRQ function is selected but not used, tie
SERIRQ high.
GPIO39