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Intel 80312 I/O Companion Chip - ECEE

Intel 80312 I/O Companion Chip - ECEE

Intel 80312 I/O Companion Chip - ECEE

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<strong>Intel</strong> ® <strong>80312</strong> I/O <strong>Companion</strong> <strong>Chip</strong>Performance Monitoring Unit11.6.4 Global Time Stamp Register (GTSR)The Global Time Stamp register (GTSR) is a 32-bit, read-only register. Writes to the GTSR have noeffect. The GTSR contains the current count value of the Global Time Stamp Counter. The counterfrequency is one-quarter the Internal Bus clock frequency. When a new mode is chosen by writinga value to the ESR, this register is reset to zero. This register can be read at any time and returns thecurrent count value.Table 11-8.Global Time Stamp Register - GTSRIOPAttributesrorororororororororororororororororororororororororororororororoPCIAttributesna na na na na na na na na na na na na na na na na na na na na na na na na na na na na na na na31 28 24 20 16 12 8 4 0<strong>Intel</strong> ® 80200 Processor Local Bus AddressAttribute Legend: RW = Read/Write0000 1110HRV = Reserved RC = Read ClearPR = Preserved RO = Read OnlyRS = Read/Set NA = Not AccessibleBit Default Description31:00 XThis is a 32-bit, read-only register. When accessed, it returns the current count value in the Global TimeStamp Counter.Developer’s Manual 11-27

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