參數(shù)資料
型號: AXDA1700DUT3C
元件分類: 微處理器
英文描述: Microprocessor
中文描述: 微處理器
文件頁數(shù): 83/104頁
文件大?。?/td> 1769K
代理商: AXDA1700DUT3C
Chapter 11
Pin Descriptions
71
25175E—November 2002
AMD Athlon XP Processor Model 8 Data Sheet
Preliminary Information
11.3
Detailed Pin Descriptions
The information in this section pertains to Table 24 on page 64.
A20M# Pin
A20M# is an input from the system used to simulate address
wrap-around in the 20-bit 8086.
AMD Pin
AMD Socket A processors do not implement a pin at location
AH6. All Socket A designs must have a top plate or cover that
blocks this pin location. When the cover plate blocks this
location, a non-AMD part (e.g., PGA370) does not fit into the
socket. However, socket manufacturers are allowed to have a
contact loaded in the AH6 position. Therefore, motherboard
socket design should account for the possibility that a contact
could be loaded in this position.
AMD Athlon
System Bus Pins
See the
AMD Athlon System Bus Specification
, order# 21902
for information about the system bus pins—PROCRDY,
PWROK, RESET#, SADDIN[14:2]#, SADDINCLK#,
SADDOUT[14:2]#, SADDOUTCLK#, SDATA[63:0]#,
SDATAINCLK[3:0]#, SDATAINVALID#, SDATAOUTCLK[3:0]#,
SDATAOUTVALID#, SFILLVALID#.
Analog Pin
Treat this pin as a NC.
APIC Pins, PICCLK,
PICD[1:0]#
The Advanced Programmable Interrupt Controller (APIC) is a
feature that provides a flexible and expandable means of
delivering interrupts in a system using an AMD processor. The
pins, PICD[1:0], are the bi-directional message-passing signals
used for the APIC and are driven to the Southbridge or a
dedicated I/O APIC. The pin, PICCLK, must be driven with a
valid clock input.
For more information, see Table 19, “APIC Pin AC and DC
Characteristics,” on page 44.
CLKFWDRST Pin
CLKFWDRST resets clock-forward circuitry for both the system
and processor.
CLKIN, RSTCLK
(SYSCLK) Pins
Connect CLKIN with RSTCLK and name it SYSCLK. Connect
CLKIN# with RSTCLK# and name it SYSCLK#. Length match
the clocks from the clock generator to the Northbridge and
processor.
See “SYSCLK and SYSCLK#” on page 76 for more information.
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