ADT7460 Analog Devices, Inc., ADT7460 Datasheet - Page 39

• Manufacturer Part Number: ADT7460
• Description: Dbcool? Remote Thermal Controller And Fan Controller
• Manufacturer: Analog Devices, Inc.

Table 49. Register 0x40—Configuration Register 1 (Power-On Default = 0x00)
Bit
<0>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
Table 50. Register 0x41—Interrupt
Bit
<0>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
Name
STRT
LOCK
RDY
FSPD
RES
FSPDIS
TODIS
V
Name
2.5V
RES
V
RES
R1T
LT
R2T
OOL
CC
CC
R/W
Read/Write
Write
Read-Only
Read/Write
Read-Only
Read
Read/Write
Read/Write
R/W
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
Read-Only
/Write
Once
Description
L
L
l
enabled. This bi
r
Logic 1 locks all
o
rogue programs such as viruses from modifying critical system limit settings. (Lockable.)
T
m
When set to 1, all fans run at full speed. Power-on default = 0. (This bit cannot be locked.)
Reserved for future use.
L
u
W
c
When set to 1, the ADT7460 rescales its V
When set to 0, the ADT7460 measures V
Descr
A 1 ind
register only if the error condition
Reserved for future use.
A 1 indicates that the V
register only if the error condition has subsided.
Reserved for future use.
A 1 indicates that the Remote 1 low or high temperature limit has been exceeded. This bit is cleared on a
read of the status register only if the error condition has subsided.
A 1 indicates the local low or high temperature limit has been exceeded. This bit is cleared on a read of the
Status Register
A 1 indicatesthat the Remote 2 low or high temperature limit has been exceeded. This bit is cleared on a
re
A
s
voltage, temperature, or
need to read Status Regis
imit values programmed are preserved even if a Logic 0 is written to this b
egisters should be programmed by BIOS before setting this bit to 1. (Lockable.)
ogic 1 enables monitorin
ogic 0 disables monitoring and PWM control based on the default power-up limit settings. Note that the
ogic 1 disables fan spin-up for two TACH pulses. Instead, the PWM outputs go high for the entire fan s
ontrollers that cannot handle SMBus timeouts. (Lockable.)
his bit is set to 1 by the ADT7460 to indicate that the device is fully powered-up and ready to begin syste
nly and cannot be modified until the ADT7460 is powered down and powered up again. This prevents
p timeout selected.
tatus bits in S
onitoring.
hen set to 1, the SMBus timeout feature is disabled. This allows the ADT746
ad of
1 indicates t
iption
Status Regis
icates that th
the status registe
hat an out-
tatus Regis
t becomes read-only and cannot be changed once Bit 1 (lock bit) has been written. All limit
only if the error condition has subsided.
limit values to their current settings. Once this bit is set, all lockable registers become read-
ter 1 (Power-O
e 2.5 V high o
CC
r only if the err
fan speed readings represente
of-limit event has been latched in
high or low limit has been exceeded
ter 2. Software can test this bit in is
ter 2 every interrupt or polling
g and PWM control outputs based on the limit settings programmed.
Rev. C | Page 39 of 52
r low limit has been
has subsided.
n Default = 0x00)
CC
or condition has subsided.
CC
as a 3.3 V supply. (Lockable.)
pin to measure a 5 V supply.
exceeded. This bit is cleared on a read of the status
d by Status Register 2 are out-of-limit. This saves the
cycle.
Status Register 2. This bit is a logical OR of all
olation to determine whether any of the
. This bit is cleared on a read of the status
it and the default settings are
0 to be used with SMBus
ADT7460
pin-
ms