ADT7468 Analog Devices, Inc., ADT7468 Datasheet - Page 66

• Manufacturer Part Number: ADT7468
• Description: Dbcool Remote Thermal Controller And Voltage Monitor
• Manufacturer: Analog Devices, Inc.

ADT7468
Table 23. Register 0x36—Dynamic T
Bit
<0>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
1
This register becomes read-only when the Configuration Register 1 lock bit is set to 1. Any subsequent attempts to write to this register fail.
Name
CYR2
V
PHTR1
PHTL
PHTR2
R1T
LT
R2T
CCP
LO
R/W
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Description
MSB of 3-bit remote 2 cycle value. The other two bits of the code reside in Dynamic T
(Reg. 0x37). These three bits define the delay time between making subsequent T
control loop, in terms of the number of monitoring cycles. The system has associated thermal time constants
that need to be found to optimize the response of fans and the control loop.
V
low limit value (Reg. 0x46), the following occurs:
• Status Bit 1 in Status Register 1 is set.
• SMBALERT is generated, if enabled.
• PROCHOT monitoring is disabled.
• Dynamic T
• The device is prevented from entering shutdown.
• Everything is re-enabled once V
PHTR1 = 1 copies the Remote 1 current temperature to the Remote 1 operating point register, if THERM is
asserted. The operating point contains the temperature at which THERM is asserted, which allows the system
to run as quietly as possible without affecting system performance.
PHTR1 = 0 ignores any THERM assertions on the THERM pin. The Remote 1 operating point register reflects its
programmed value.
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 asserted, which allows the system
to run as quietly as possible without affecting system performance.
PHTL = 0 ignores any THERM assertions on the THERM pin. The local operating temperature point register
reflects its programmed value.
PHTR2 = 1 copies the Remote 2 current temperature to the Remote 2 operating point register, if THERM is
asserted. The operating point contains the temperature at which THERM is asserted. This allows the system to
run as quietly as possible without affecting system performance.
PHTR2 = 0 ignores any THERM assertions on the THERM pin. The Remote 2 operating point register reflects its
programmed value.
R1T = 1 enables dynamic T
dynamically adjusted based on the current temperature, operating point, and high and low limits for this
zone.
R1T = 0 disables dynamic T
described in the Fan Speed Control section.
LT=1 enables dynamic T
adjusted based on the current temperature, operating point, and high and low limits for this zone.
LT = 0 disables dynamic T
described in the Fan Speed Control section.
R2T = 1 enables dynamic T
dynamically adjusted based on the current temperature, operating point, and high and low limits for this
zone.
R2T = 0 disables dynamic T
described in the Fan Speed Control section.
CCP
LO = 1. When the power is supplied from 3.3 V STANDBY and the core voltage (V
MIN
Control Register 1 (Power-On Default = 0x00)
MIN
control is disabled.
MIN
MIN
MIN
MIN
MIN
MIN
control on the local temperature channel. The chosen T
control. The T
control on the Remote 1 temperature channel. The chosen T
control on the Remote 2 temperature channel. The chosen T
control. The T
control. The T
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CCP
increases above the V
MIN
MIN
MIN
value chosen is not adjusted, and the channel behaves as
value chosen is not adjusted, and the channel behaves as
value chosen is not adjusted, and the channel behaves as
CCP
low limit.
1
MIN
MIN
CCP
adjustments in the
MIN
value is dynamically
) drops below its V
Control Register 2
MIN
MIN
value is
value is
CCP