Analog Devices dBCool ADT7473 Manual page 62

ADT7473
Table 23. Register 0x36—Dynamic T
Bit N ame R/W Descrip
[0] C YR2 R /W MSB of
(Reg. 0x
in terms
found
[1] V LO R/W V LO =
CCP CCP
value (R
• Statu Bit 1 in Interrupt Status Register 1 is set.
• SMBAL
• PROCHOT monitoring is disabled.
• Dynam
• The de
• Everyt
[2] P HTR1 R /W PHTR1 =
The ope
possible
PHTR1 =
program med value.
[3] PHTL R/W PHTL = 1 copies the local channel's current temperature to the local operating point register if THERM is asserted. The
operating point contains the temperature at which THERM is ass
possible
PHTL = 0 ignores any THERM assertions on the THERM pin. The local temperature operating point register reflec
pro gra
[4] PHTR2 R/W PHT R2
The op
poss ible
PH TR2
programmed value.
[5] R1T R/W R1T =
adjusted based on the cur
R1T =
the F an Speed C
[6] LT R/W LT=1 e
based
LT = 0
the Fan Speed Control section.
[7] R2T R/W R2T = 1 enables dynamic T
adjusted based on the current temperature, operating point, an
R2T = 0 d
the F an
1
Thi s re gister be mes read-only hen the Configuration Register 1 lock bit is set to 1. Any subsequent attempts to write to this register fail. co w
Control Register 1 (Power-On Default =
MIN
tion
3-bit remote 2 cycle value. The other two bits of the code reside in Dynamic T
37). These three bits define the delay time between making subsequent T
of the number of monitoring cycles. The system has associated thermal time constants that need to be
to optimize the response of fans and the control loop.
1. When the power is supplied from 3.3 V STANDBY and the core voltage (V
egister 0x46), the following occurs:
s
ERT is generated, if enabled.
ic T control is disabled.
MIN
vice is prevented from entering shutdown.
hing is re-enabled once V
CCP
1 copies the Remote 1 current temperature to the Remote 1 operating point register if THERM is asserted.
rating point contains the temperature at which THERM
without affecting system performance.
0 ignores any THERM assertions on the THERM pin. The Remote 1 operating point register reflects its
without aff ecting system performance.
mmed value.
= 1 copies the Remote 2 current temperature to the Remote 2 operating point register if THERM is asserted.
erating point contains the temperature at which
without affecting system performance.
= 0 ignores any THERM assertions on the THERM pin. The Remote 2 operating point register reflects its
1 enables dynamic T control on the Remote 1 temperature channel. The chosen T
MIN
rent temperature, operating point, and high and low limits for this zone.
0 disables dynamic T control. The T
MIN
ontrol section.
nables dynamic T control on the local temperature channel. The chosen T
MIN
on the current temperature, operating point, and high and low limits for this zone.
disables dynamic T control. The T
MIN
control on the Remote 2 temperat
MIN
isables dynamic T control. The T
MIN
Speed Control section.
0x00)
increases above the V low limit.
CCP
is asserted, allowing the system to run as quietly as
THERM is asserted, allowing the system to run as quietly as
value chosen is not adjusted, and the channel behaves as described
MIN
value chosen is not adjusted, and the channel behaves as descr
MIN
ure channel. The chosen T
d high and low limits for this zone.
value chosen is not adjusted and the channel behaves as described in
MIN
Rev. A | Page 62 of 76
1
Control Register 2
MIN
adjustments in t
MIN
) drops below its V
CCP
erted. This allows the system to run as quietly as
value is dynamically
MIN
value is dynamically adjusted
MIN
value is dynamically
MIN
he control loop,
low li mit
CCP
ts its
in
ibed in