ADT7475 データシートの表示（PDF） - ON Semiconductor
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ADT7475 Datasheet PDF : 58 Pages
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ADT7475
Table 51. Register 0x7D — Configuration Register 4 (Power−On Default = 0x00)
Bit No. Mnemonic
[1:0] PIN9FUNC
[2]
THERM
Disable
[3]
Max/Full
on THERM
[4:7]
[5]
RES
BpAttVCCP
R/W
(Note 1)
R/W
R/W
R/W
R/W
Description
These bits set the functionality of Pin 9:
00 = TACH4 (default)
01 = Bidirectional THERM
10 = SMBALERT
11 = GPIO
THERM Disable = 0, THERM overtemperature output is enabled assuming THERM is correctly
configured (Register 0x78, Register 0x7C, and Register 0x7D).
THERM Disable = 1, THERM overtemperature output is disabled on all channels.
THERM can also be disabled on any channel by the following:
In Offset 64 mode, writing −64°C to the appropriate THERM temperature limit.
In twos complement mode, writing −128°C to the appropriate THERM temperature limit.
Max/Full on THERM = 0. When THERM limit is exceeded, fans go to full speed.
Max/Full on THERM = 1. When THERM limit is exceeded, fans go to maximum speed as
defined in Register 0x38, Register 0x39, and Register 0x3A.
Unused.
Bypass VCCP attenuator. When set, the measurement scale for this channel changes from 0 V
(0x00) to 2.2965 V (0xFF).
[6:7]
RES
Unused.
1. These registers become read−only when the Configuration Register 1 lock bit is set to 1. Any subsequent attempts to write to these registers fail.
Table 52. Register 0x7E — Manufacturer’s Test Register 1 (Power−On Default = 0x00)
Bit No. Mnemonic
[7:0] Reserved
R/W
Read−only
Description
Manufacturer’s test register. These bits are reserved for manufacturer’s test purposes and
should not be written to under normal operation.
Table 53. Register 0x7F — Manufacturer’s Test Register 2 (Power−On Default = 0x00)
Bit No. Mnemonic
[7:0] Reserved
R/W
Read−only
Description
Manufacturer’s test register. These bits are reserved for manufacturer’s test purposes and
should not be written to under normal operation.
ORDERING INFORMATION
Device Number
Temperature Range
Package Type
Package Option
Shipping†
ADT7475ARQZ
−40°C to +125°C
16−Lead QSOP
RQ−16
98 Rail
ADT7475ARQZ−REEL
−40°C to +125°C
16−Lead QSOP
RQ−16
2500 Tape & Reel
ADT7475ARQZ−RL7
−40°C to +125°C
16−Lead QSOP
RQ−16
1000 Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
*The “Z’’ suffix indicates Pb−Free part.
http://onsemi.com
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