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CS5535 датащи(PDF) 418 Page - National Semiconductor (TI) |
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CS5535 датащи(HTML) 418 Page - National Semiconductor (TI) |
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418 / 555 page ![]() www.national.com 418 Revision 0.8 5.14 LOW PIN COUNT REGISTER DESCRIPTIONS The registers for the Low Pin Count (LPC) port are divided into two sets: • Standard GeodeLink Device MSRs (Shared with DIVIL, see Section 5.6.1 on page 299.) • LPC Specific MSRs The MSRs are accessed via the RDMSR and WRMSR pro- cessor instructions. The MSR address is derived from the perspective of the CPU Core. See Section 3.2 "CS5535 MSR Addressing" on page 53 for more details on MSR addressing. All MSRs are 64 bits, however, the LPC Specific MSRs are called out as 32 bits. The LPC module treats writes to the upper 32 bits (i.e., bits [63:32]) of the 64-bit MSRs as don’t cares and always returns 0 on these bits. The LPC Specific MSRs are summarized in Table 5-54. The reference column in the summary table points to the page where the register maps and bit descriptions are listed. Table 5-54. LPC Specific MSRs Summary MSR Address Type Register Name Reset Value Reference 5140004Ch RO LPC Address Error (LPC_EADDR) 00000000h Page 419 5140004Dh RO LPC Error Status (LPC_ESTAT) 00000000h Page 419 5140004Eh R/W LPC Serial IRQ Control (LPC_SIRQ) 00000000h Page 419 5140004Fh R/W LPC Reserved (LPC_RSVD) 00000000h Page 419 |
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