EVAL-ADT7467EBZ ON Semiconductor, EVAL-ADT7467EBZ Datasheet - Page 65

• Manufacturer Part Number: EVAL-ADT7467EBZ
• Description: BOARD EVALUATION FOR ADT7467
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of EVAL-ADT7467EBZ

• Sensor Type: Temperature
• Sensing Range: -40°C ~ 120°C
• Interface: SMBus (2-Wire/I²C)
• Sensitivity: ±1.5°C
• Voltage - Supply: 3 V ~ 5.5 V
• Embedded: No
• Utilized Ic / Part: ADT7467
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 26. Register 0x40—Configuration Register 1 (Power-On Default = 0x01)
Bit
<0>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
1
Table 27. Register 0x41—Interrupt Status Register 1 (Power-On Default = 0x00)
Bit
<1>
<2>
<4>
<5>
<6>
<7>
This register becomes a read-only register when the Configuration Register 1 LOCK bit is set to 1. Any subsequent attempts to write to this register fail.
Name
STRT
LOCK
RDY
FSPD
VxI
FSPDIS
TODIS
V
Name
V
V
R1T
LT
R2T
OOL
CC
CCP
CC
R/W
Read only
Read only
Read only
Read only
Read only
Read only
R/W
Read/write
Write once
Read only
Read/write
Read/write
Read/write
Read/write
Read/write
Description
V
status register if the error condition has subsided.
V
register if the error condition has subsided.
R1T = 1 indicates that the Remote 1 low or high temperature has been exceeded. This bit is cleared upon a
read of the status register if the error condition has subsided.
LT = 1 indicates that the local low or high temperature has been exceeded. This bit is cleared upon a read of
the status register if the error condition has subsided.
R2T = 1 indicates that the Remote 2 low or high temperature has been exceeded. This bit is cleared upon a
read of the status register if the error condition has subsided.
OOL = 1 indicates that an out-of-limit event has been latched in Status Register 2. This bit is a logical OR of all
status bits in Status Register 2. Software can test this bit in isolation to determine whether any of the voltage,
temperature, or fan speed readings represented by Status Register 2 are out of limit, which eliminates the
need to read Status Register 2 at every interrupt or in every polling cycle.
Description
Logic 1 enables monitoring and PWM control outputs based on the limit settings programmed.
Logic 0 disables monitoring and PWM control based on the default power-up limit settings.
Note that the limit values programmed are preserved even if a Logic 0 is written to this bit and the default
settings are enabled. This bit becomes a read-only bit and cannot be changed once Bit 1 (LOCK bit) has been
written. All limit registers should be programmed by BIOS before setting this bit to 1. (Lockable)
Logic 1 locks all limit values to their current settings. Once this bit is set, all lockable registers become read-
only registers and cannot be modified until the ADT7467 is powered down and powered up again. This
prevents rogue programs such as viruses from modifying critical system limit settings. (Lockable)
This bit is only set to 1 by the ADT7467 to indicate that the device is fully powered up and ready to begin
system monitoring.
When set to 1, this bit runs all fans at full speed. Power-on default = 0. This bit cannot be locked at any time.
BIOS should set this bit to a 1 when the ADT7467 is configured to measure current from an ADI ADOPT™ VRM
controller and to measure the CPU’s core voltage. This bit allows monitoring software to display the watts
used by the CPU. (Lockable)
Logic 1 disables fan spin-up for two TACH pulses, and the PWM outputs go high for the entire fan spin-up
timeout selected.
When this bit is set to 1, the SMBus timeout feature is disabled. This allows the ADT7467 to be used with
SMBus controllers that cannot handle SMBus timeouts. (Lockable)
When this bit is set to 1, the ADT7467 rescales its V
measures V
CCP
CC
= 1 indicates that the V
= 1 indicates that the V
CC
as a 3.3 V supply. (Lockable)
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CC
CCP
high or low limit has been exceeded. This bit is cleared upon a read of the status
high or low limit has been exceeded. This bit is cleared upon a read of the
1
CC
pin to measure 5 V supply. If this bit is 0, the ADT7467
ADT7467