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CS5535 数据表(PDF) 99 Page - National Semiconductor (TI) |
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CS5535 数据表(HTML) 99 Page - National Semiconductor (TI) |
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99 / 555 page  Revision 0.8 99 www.national.com DIVIL Functional Description (Continued) 4.6.1.4 Miscellaneous Block Special cycles are sent to the Miscellaneous block. They are decoded as given in Table 4-10. Note that the Halt spe- cial cycle depends on the value of the SPEC_CYC_MD bit in MSR_LEG_IO (MSR 51400014h[28]). Soft IRQ and Soft Reset MSRs are decoded within the Mis- cellaneous block. Each block in the Diverse Device generates an output to the DIVIL. The DIVIL DOM has a port for each of the func- tions and is responsible for selecting between them. 4.6.2 Standard MSRs This block contains the Standard GeodeLink Device MSRs and their associated logic. These standard MSRs are: Capabilities, Master Configuration, SMI Control, Error Con- trol, Power Management, and Diagnostics. The Capabili- ties, Master Configuration, and Diagnostic MSRs are “passive” in that they contain values that have an effect elsewhere. The other MSRs have various “active” bits that are set and cleared via hardware/software interactions. Table 4-10. Special Cycle Decodes Cycle Type Address Function Action Write 00h Shutdown Send shutdown pulse to MSR_ERROR. Send shutdown pulse to MSR_SMI. If RESET_SHUT_EN (MSR 51400014h[31]) is high, send reset pulse to power management indicating shutdown reset. SPEC_CYC_MD (MSR 51400014h[28]) = 0 Write 01h Halt Send halt pulse to MSR_SMI. SPEC_CYC_MD (MSR 51400014h[28]) = 1 Write 02h Halt Send halt pulse to MSR_SMI. All other values x86 Special Discard with no side effects. All other values Not Defined Discard with no side effects. Read 00h Interrupt Ack Send cycle to PIC. GeodeLink Adapter generates back-to-back bus cycles. All other values Not Defined Return zero with no side effects. |
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