DS1780E 查看數據表（PDF） - Maxim Integrated

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DS1780E

CPU Peripheral Monitor

Maxim Integrated 

RESERVED REGISTER (ADDRESS 0X45; POWER-UP DEFAULT=00h)

Table 10.7

BIT NAME R/W

DESCRIPTION

<7:0> RESERVED R/W Undefined (Power On = 00h).

DS1780

CHASSIS INTRUSION CLEAR REGISTER (ADDRESS 0X46; POWER-UP

DEFAULT=00h) Table 10.8

BIT NAME R/W

DESCRIPTION

0-6 RESERVED R/W Undefined (Power On = 00h).

7

Chassis Int

Clear

R/W

A 1 outputs a minimum 20 ms active low pulse on the Chassis Intrusion (CHS) pin. The

register bit clears itself after the pulse has been output.

VID REGISTER (ADDRESS 0x47; POWER-UP DEFAULT = SEE “ADDRESS

POINTER” TABLE) Table 10.9

BIT NAME R/W

DESCRIPTION

0-3

VID

R

The VID[3:0] inputs from Pentium/PRO power supplies to indicate the operating voltage

(e.g., 1.5V to 2.9V).

FAN1 Speed Control.

4-5

FAN1 RPM

control

<5:4> = 00 - divide by 1

R/W <5:4> = 01 - divide by 2

<5:4> = 10 - divide by 4

<5:4> = 11 - divide by 8

FAN2 Speed Control.

6-7

FAN2 RPM

control

<7:6> = 00 - divide by 1

R/W <7:6> = 01 - divide by 2

<7:6> = 10 - divide by 4

<7:6> = 11 - divide by 8

SERIAL ADDRESS REGISTER (ADDRESS 0x48; POWER-UP DEFAULT =

SEE DESCRIPTION BELOW) Table 10.10

BIT NAME R/W

DESCRIPTION

0-7

2-Wire Bus

Address

R/W 2-Wire Bus Address (Power On = 001011(A1)(A0)).

VID4 REGISTER (ADDRESS 0x49; POWER-UP DEFAULT = SEE

DESCRIPTION BELOW Table 10.11

BIT NAME R/W

DESCRIPTION

0

VID 4

R VID4 Input.

1-7 Reserved R/W Default Power On Values = 1000000.

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