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| 型号： | AXDA2600DKV3D |
| 厂商： | ADVANCED MICRO DEVICES INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 2083 MHz, MICROPROCESSOR, CPGA453 |
| 封装： | OPGA-453 |
| 文件页数： | 95/106页 |
| 文件大小： | 2275K |
| 代理商： | AXDA2600DKV3D |
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Chapter 11
Pin Descriptions
77
25175H—March 2003
AMD Athlon XP Processor Model 8 Data Sheet
Preliminary Information
DC characteristics for FID[3:0].
FSB_Sense[1:0] Pins
FSB_Sense[1:0] pins are either open circuit (logic level of 1) or
are pulled to ground (logic level of 0) on the processor package
with a 1 k
resistor. In conjunction with a circuit on the
motherboard, these pins may be used to automatically detect
the front-side bus (FSB) setting of this processor. Proper
detection of the FSB setting requires the implementation of a
pull-up resistor on the motherboard. Refer to the AMD Athlon
Processor-Based Motherboard Design Guide, order# 24363 and the
technical note FSB_Sense Auto Detection Circuitry for Desktop
Processors, order# TN26673 for more information.
Table 27 is the truth table to determine the FSB of desktop
processors.
The FSB_Sense[1:0] pins are 3.3-V tolerant.
FLUSH# Pin
FLUSH# must be tied to VCC_CORE with a pullup resistor. If a
debug connector is implemented, FLUSH# is routed to the
debug connector.
IGNNE# Pin
IGNNE# is an input from the system that tells the processor to
ignore numeric errors.
INIT# Pin
INIT# is an input from the system that resets the integer
registers without affecting the floating-point registers or the
internal caches. Execution starts at 0_FFFF_FFF0h.
INTR Pin
INTR is an input from the system that causes the processor to
start an interrupt acknowledge transaction that fetches the
8-bit interrupt vector and starts execution at that location.
JTAG Pins
TCK, TMS, TDI, TRST#, and TDO are the JTAG interface.
Connect these pins directly to the motherboard debug
connector. Pull TDI, TCK, TMS, and TRST# up to VCC_CORE with
pullup resistors.
Table 27. Front-Side Bus Sense Truth Table
FSB_Sense[1]
FSB_Sense[0]
Bus Frequency
1
0
RESERVED
11
133 MHz
01
166 MHz
0
RESERVED
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