參數(shù)資料
型號(hào)： 24707_PUB
英文描述： Programmable Resolution 1-Wire Digital Thermometer
中文描述： 時(shí)鐘發(fā)生器規(guī)格的AMD Athlon？ 64和AMD Opteron？處理器
文件頁(yè)數(shù)： 12/51頁(yè)
文件大?。?/td> 1783K
代理商： 24707_PUB
Clock Generator Specification for AMD64 Processors
24707 Rev. 3.08 September 2003
The following notes give additional information on the PCISTOP33_L control sequence.
Notes:
1.
All timing is referenced to internal CPUCLK.
2.
PCISTOP33_L is an asynchronous input.
3.
All other clocks continue to run undisturbed.
4.
PCI33_HT66SEL_L is shown in the High state.
5.
PCISTOP33_L must meet 10 ns setup/hold times.
1.7
Input Reference Crystal Definition
The crystal inputs and pin loading should be compatible with 18-pF crystals.
1.8
Internal Input Pullup Resistors
This specification defines internal pullup resistors on most of the control inputs. The internal
input pullup resistors allow the input pins to be left unconnected in applications where their
function is unnecessary. Additionally, these input pullup resistors provide the required pullup for
open drain-type outputs for SMBus. The general range of values is provided for these internal
pullups.
1.9
Software Interface and Control
Software interface and control of the clock generator are described in Sections 1.9.1 and 1.9.2.
1.9.1
Hardware Selection with Software Programmable Overrides
Configuration of the features of the clock generator can be completed through hardware pin
strapping alone or by hardware pin strapping with optimization of features through programmable
registers accessed through the SMBus interface. The values of the programmable registers will
override any hardware strapped settings, once the settings are changed.
1.9.2
Configuration Read-Back
The values of the programmable registers can be read back through the SMBus interface to allow
the current operating state of the device to be determined.
8
Description
Chapter 1
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