Specifications

Programmers Model

ID052914 Non-Confidential

4.1 About this programmers model

The following information applies to the Motherboard Express µATX registers:

• The base address is not fixed, and can be different for any particular system

implementation. The offset of each register from the base address is fixed.

• Do not attempt to access reserved or unused address locations. Attempting to access these

locations can result in Unpredictable behavior.

• Unless otherwise stated in the accompanying text:

— Do not modify undefined register bits.

— Ignore undefined register bits on reads.

— All register bits are reset to a logic 0 by a system or power-on reset.

• Access type in Table 4-3 on page 4-8 is described as follows:

RW Read and write.

RO Read only.

WO Write only.