31994A | AMD Sempron™ Processor Model 10 with 256K L2 Cache Data Sheet |
10.3Detailed Pin Descriptions
| The information in this section pertains to Table 20 on page 60. |
A20M# Pin | A20M# is an input from the system used to simulate address |
| |
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 |
| 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™ | See the A M D Athlon™ and AMD Duron™ System Bus |
System Bus Pins | 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, | The Advanced Programmable Interrupt Controller (APIC) is a |
PICD[1:0]# | 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 bidirectional |
| 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. |
| Refer to “VCC_2.5V Generation Circuit” found in the section, |
| “Motherboard Required Circuits,” of the AMD Athlon™ |
| Processor Motherboard Design Guide, order# 24363 for the |
| required supporting circuitry. |
| For more information, see Table 15, “APIC Pin AC and DC |
| Characteristics,” on page 37. |
CLKFWDRST Pin | CLKFWDRST resets |
| and processor. |
Chapter 10 | Pin Descriptions | 68 |