ADM1025 View Datasheet(PDF) - ON Semiconductor

Part Name

Description

Manufacturer

ADM1025

Low Cost PC Hardware Monitor ASIC

ON Semiconductor 

ADM1025/ADM1025A

REGISTERS

Table 8. Address POINTER Register

Bit Name

R/W Description

7–0 Address Pointer

Write

Address of ADM1025/

ADM1025A Registers. See

the tables below for detail.

Table 9. List of Registers

Register Name

Address

A7–A0

in Hex

Configuration

40h

Register

Status Register 1

41h

Status Register 2

42h

VID Register

47h

VID4 Register

49h

Value and Limit

Registers

Company ID

Stepping

15–3Dh

3Eh

3Fh

Power On Value of

Registers: <7:0>

0000 1000

0000 0000

0000 0000

<7:4> = 0000, <3:0> = VID3–

VID0

<0> = VID4; Default = 1000

000 (VID4)

0100 0001

0010 (Bits 3:0 Version

Number)

Preliminary Technical Data

Table 10. Register 40h – Configuration Register

Bit Name

R/W

Description

0 START

Read/Write

Logic 1 enables startup of

monitor ASIC, and Logic 0

places the ASIC in standby

mode. At startup, limit

checking functions and

scanning begins. Note, all

HIGH and LOW LIMITS should

be set into the ADM1025/

ADM1025A prior to turning

on this bit. (Power-up Default

= 0.)

1 Reserved Read

2 Reserved Read

3 Reserved Read

4 RESET

Read/Write

Setting this bit generates a

minimum 20 ms low pulse on

Pin 16 if the function is

enabled.

5 +12/VID4

Select

Read/Write

Selects whether Pin 11 acts

as a 12 V analog input

monitoring pin, or as a VID[4]

input. This pin defaults to the

12 V analog input. (Default =

0.)

6 Reserved Read

7 Initialization Read/Write Logic 1 restores power-up

default values to the

Configuration Register and

Status Registers. This bit

automatically clears itself and

the power-on default is zero.

Rev. P5 | Page 18 of 21| www.onsemi.com

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