各位，请教一个问题，谁用过s1d13506ic，我想请教如下问题：
1，它的datasheet说：
Register Mapping
The S1D13506 registers are memory-mapped. When the system decodes the input pins as
CS# = 0 and M/R# = 0, the registers may be accessed. The register space is decoded by
A20-A0.
但是A0已经接高电平了，这不是不对了嘛？因为A0一直是高电平啊。怎么回事。
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楼主
