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ADM1025 Datasheet(PDF) 18 Page - ON Semiconductor

Part No. ADM1025
Description  Low Cost PC Hardware Monitor ASIC
Download  21 Pages
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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ADM1025 Datasheet(HTML) 18 Page - ON Semiconductor

 
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ADM1025/ADM1025A
Preliminary Technical Data
Rev. P5 | Page 18 of 21| www.onsemi.com
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
Power On Value of
Registers: <7:0>
Configuration
Register
40h
0000 1000
Status Register 1
41h
0000 0000
Status Register 2
42h
0000 0000
VID Register
47h
<7:4> = 0000, <3:0> = VID3–
VID0
VID4 Register
49h
<0> = VID4; Default = 1000
000 (VID4)
Value and Limit
Registers
15–3Dh
Company ID
3Eh
0100 0001
Stepping
3Fh
0010 (Bits 3:0 Version
Number)
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.


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