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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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82374EB датащи(PDF) 47 Page - Intel Corporation |
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82374EB датащи(HTML) 47 Page - Intel Corporation |
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47 / 208 page  82374EB82374SB 3117 PACPCIAPIC CONTROL REGISTER Address Offset 70h Default Value 00h Attribute ReadWrite Size 8 Bits The PAC Register controls the operation of the INTR signal in APICPIC configuration and the routing of the System Management Interrupt (SMI) Bit Description 72 Reserved 1 SMI Routing Control (SMIRC) When SMIRCe1 the SMI is routed via the APIC When SMIRCe0 the SMI is routed via the SMI signal Note that when SMRCe1 INTR can not be routed through the APIC since it is sharing the APIC interrupt input with SMI 0 INTR Routing Control (INTRC) When APIC is enabled (in mixed or pure APIC mode) this bit allows the ESC’s external INTR signal to be masked (forces INTR to the inactive state but does not tri-states the signal) Thus the CPU’s INTR pin can be used (by providing a simple -gate) for the APIC Local Interrupt (LINTRx) However INTR must not be masked via this bit when APIC is disabled and INTR is the only mechanism to signal the 8259 recognized interrupts to the CPU When INTRCe1 INTR is disabled (APIC must be enabled) When INTRCe0 INTR is enabled 3118 TESTCTEST CONTROL REGISTER Address Offset 88h Default Value 00h Attribute ReadWrite Size 8 Bits This register provides control for ESC manufacturing test modes The functionality of this register is reserved 3119 SMICNTLSMI CONTROL REGISTER Address Offset A0h Default Value 08h Attribute ReadWrite Size 8 Bits For the 82374SB the SMICNTL Register provides Fast Off Timer control STPCLK enabledisable and CPU clock scaling This register also enablesdisables the system management interrupt (SMI) Bit Description 7 Reserved Must be 0 when writing this register 64 Reserved 3 Fast Off Timer Freeze (CTMRFRZ) This field enablesdisables the Fast Off Timer When this bit is 1 the Fast Off timer stops counting This prevents time-outs from occurring while executing SMM code When this bit is 0 the Fast Off timer counts 47 |
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