AMD-761 datasheet(87/264 Pages) AMD

87 / 264 page

Chapter 2

AMD-761™ System Controller Programmer’s Interface

24081D—February 2002

AMD-761™ System Controller Software/BIOS Design Guide

Preliminary Information

Bit Definitions

Config Status (Dev0:F0:0x88)

Bit

Name

Function

31–29

AGP_Clk_Mux

AGP Clock Mux

For internal test only.

28–26

Sys_Clk_Mux

System Clock Mux

For internal test only.

Type_Det

Type Detect

0 = This installed card in the AGP slot uses 1.5-V signalling.

1 = This installed card in the AGP slot uses 3.3-V signalling.

S2K_Thresh

AMD Athlon™ Processor System Bus Threshold

AMD Athlon™ processor system bus threshold range select for AMD Athlon™ system bus

I/O cells. When Low, these AMD Athlon processor system bus inputs sense input

thresholds between 1.35 V and 1.9 V. When High, the inputs sense thresholds between 2.0

V and 2.2 V.

K7_PP_En

AMD Athlon Processor Push-Pull Driver Enable

When set, this bit indicates that the AMD Athlon processor push-pull drivers are enabled.

IG_PP_En

AMD-761™ System Controller Push-Pull Driver Enable

When set, this bit indicates that the AMD-761 system controller push-pull drivers are

enabled.

21–20

Clk_Speed

Clock Speed

This bit field defines the speed of the system clock received by the AMD-761 system

controller:

00 = 100 MHz

01 = 66 MHz

10 = Reserved

11 = 133 MHz

19–18

Reserved

17–16

S2K0_Bus_Len

AMD Athlon Processor System Bus Length

This bit field indicates the relative length of the AMD Athlon processor system bus trace

routing on the motherboard.

00 = Short

01..............

10...............

1 = Long

Tristate_En

Tristate Enable

For internal test only.

NAND_En

NAND Enable

For internal test only.

AMD-761 Datasheet(PDF) 87 Page - Advanced Micro Devices

AMD-761 Datasheet(HTML) 87 Page - Advanced Micro Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL