ADT7463ARQZ ON Semiconductor, ADT7463ARQZ Datasheet - Page 36

• Manufacturer Part Number: ADT7463ARQZ
• Description: IC REMOTE THERMAL CTRLR 24-QSOP
• Manufacturer: ON Semiconductor
• Series: dBCool®r

Specifications of ADT7463ARQZ

• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Fan Speed Counter, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 120°C, External Sensor
• Output Type: SMBus™
• Output Alarm: No
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 120°C
• Mounting Type: Surface Mount
• Package / Case: 24-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADT7463
Bit
<0>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
*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
Table X. Register 0x36 – Dynamic T
R/W
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
PHTR1 = 1 copies the Remote 1 current temperature to the Remote 1 Operating Point
PHTL = 1 copies the local channel’s current temperature to the Local Operating Point
PHTR2 = 1 copies the Remote 2 current temperature to the Remote 2 Operating Point
R1T = 1 enables dynamic T
LT = 1 enables dynamic T
Description
MSB of 3-Bit Remote 2 Cycle Value. The other two bits of the code reside in Dynamic T
Control Register 2 (Reg. 0x37). These three bits define the delay time between making sub-
sequent T
The system has associated thermal time constants that need to be found to optimize
the response of fans and the control loop.
V
• Status Bit 1 in Status Register 1 gets set.
• SMBALERT gets generated if enabled.
• PROCHOT monitoring is disabled.
• Dynamic T
• The device is prevented from entering shutdown.
• Everything re-enabled once V
Register if THERM gets asserted. The operating point contains the temperature at
which THERM is asserted. This allows the system to run as quietly as possible without
system performance being affected. PHTR1 = 0 ignores any THERM assertions on the
THERM pin. The Remote 1 Operating Point Register reflects its programmed value.
Register if THERM gets asserted. The operating point contains the temperature at
which THERM is asserted. This allows the system to run as quietly as possible without
system performance being affected. PHTL = 0 ignores any THERM assertions on the
THERM pin. The Local Temp Operating Point Register reflects its programmed value.
Register if THERM gets asserted. The operating point contains the temperature at
which THERM is asserted. This allows the system to run as quietly as possible without
system performance being affected. PHTR2 = 0 ignores any THERM assertions on the
THERM pin. The Remote 2 Operating Point Register reflects its programmed value.
chosen T
ating point, and high and low limits for this zone. R1T = 0 disables dynamic T
trol. The T
in the Automatic Fan Control section.
T
point, and high and low limits for this zone. LT = 0 disables dynamic T
T
Automatic Fan Control section.
R2T = 1 enables dynamic T
chosen T
operating point, and high and low limits for this zone. R2T = 0 disables dynamic T
control. The T
described in the Automatic Fan Control section.
CCP
MIN
MIN
(V
LO = 1. When the power is supplied from 3.3 V STANDBY and the core voltage
CCP
value is dynamically adjusted based on the current temperature, operating
value chosen is not adjusted and the channel behaves as described in the
Rev. 4 | Page 36 of 52 | www.onsemi.com
) drops below its V
MIN
MIN
MIN
MIN
value is dynamically adjusted based on the current temperature, oper-
value is dynamically adjusted based on the current temperature,
MIN
adjustments in the control loop, in terms of number of monitoring cycles.
value chosen is not adjusted and the channel behaves as described
MIN
MIN
control is disabled.
value chosen is not adjusted and the channel behaves as
Control Register 1 (Power-On Default = 0x00)
–36–
MIN
CCP
MIN
MIN
control on the Local Temperature channel. The chosen
low limit value (Reg. 0x46), the following occurs:
CCP
control on the Remote 1 Temperature channel. The
control on the Remote 2 Temperature channel. The
increases above V
CCP
low limit.
MIN
control. The
MIN
REV. C
con-
MIN
MIN