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CS5320 Datasheet(PDF) 53 Page - Applied Micro Circuits Corporation |
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CS5320 Datasheet(HTML) 53 Page - Applied Micro Circuits Corporation |
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53 / 160 page  S5320 – PCI Match Maker: PCI Configuration Registers Revision 5.03 – June 14, 2006 AMCC Confidential and Proprietary DS1656 53 Data Sheet 1. The Expansion ROM Base Address Register nvRAM boot value is internally hardwired to FFFFF80Xh, where X = 000xb (i.e., only the least- significant bit, or Address Decode Enable bit, is programmable). This defines both the minimum and maximum expansion ROM size sup- ported by the S5320 (2K bytes). The Address Decode Enable bit in the nvRAM (the LSB) must be set to enable this region. If not set, a PCI Configuration read of this region will always respond with 00000000h. Table 27. Read Response to Expansion ROM Base Address Register (after all ones written) Response Size in Bytes nvRAM boot value 00000000h none - disabled 00000000h or BIOS missing 1 FFFFF801h 2K bytes (512 DWORDs) FFFFF801h |
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