参数资料
型号: A0800AMS3C
厂商: ADVANCED MICRO DEVICES INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 800 MHz, MICROPROCESSOR, CPGA462
封装: STAGGERED, CERAMIC, PGA-453
文件页数: 80/90页
文件大小: 1492K
代理商: A0800AMS3C
Chapter 10
Pin Descriptions
67
23792H—March 2001
AMD Athlon Processor Model 4 Data Sheet
Preliminary Information
SYSVREFMODE Pin
SYSVREFMODE (AA5) is Low to ensure that the external
VREFSYS voltage is the actual voltage used by the input
buffers and that no scaling occurs internally between the
VREFSYS voltage and the input threshold. This pin is tied Low
with a pulldown resistor.
VCCA Pin
VCCA is the processor PLL supply. For information about the
page 25 and the Socket A Motherboard Design Guide, order#
24363.
VID[4:0] Pins
The VID[4:0] signals are outputs to the motherboard that
indicate the required VCC_CORE voltage for the processor. The
VCC_CORE ID (VID) is sent to the motherboard VCC_CORE
regulator. The processor VID[4:0] outputs are open drain. See
DC characteristics for VID[4:0].
The motherboard is required to pull VID[4:0] High for the
voltage regulator to supply voltage in the appropriate range for
the AMD Athlon Processor Model 4. These voltage ID values
Note: The VID[3:0] for Slot A has a different code definition than
VID[4:0] for Socket A.
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