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| 型号： | ADT7463ARQ |
| 厂商： | ON Semiconductor |
| 文件页数： | 37/50页 |
| 文件大小： | 726K |
| 描述： | IC REMOTE THERMAL CTRLR 24-QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Obsolescence 11/Feb/2009 |
| 标准包装： | 56 |
| 系列： | dBCool® |
| 功能： | 风扇控制，温度监控器 |
| 传感器类型： | 内部和外部 |
| 感应温度： | -40°C ~ 120°C，外部传感器 |
| 精确度： | ±1.5°C（最小值） |
| 拓扑： | ADC，比较器，风扇速度计数器，多路复用器，寄存器库 |
| 输出类型： | SMBus? |
| 输出警报： | 无 |
| 输出风扇： | 是 |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 120°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.154"，3.90mm 宽） |
| 供应商设备封装： | 24-QSOP |
| 包装： | 管件 |
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ADT7463
http://onsemi.com
37
Table 50. OPERATING POINT REGISTERS (POWERON DEFAULT = 0X64) (Note 1)
Register Address
R/W
Description
0x33
R/W
Remote 1 Operating Point Register (Default = 100癈)
0x34
R/W
Local Temp Operating Point Register (Default = 100癈)
0x35
R/W
Remote 2 Operating Point Register (Default = 100癈)
1. These registers become readonly when the Configuration Register 1 lock bit is set to 1. Any subsequent attempts to write to these registers
will fail. These registers set the target operating point for each temperature channel when the dynamic T
MIN
control feature is enabled. The
fans being controlled are adjusted to maintain temperature about an operating point.
Table 51. REGISTER 0X36 DYNAMIC T
MIN
CONTROL REGISTER 1 (POWERON DEFAULT = 0X00) (Note 1)
Bit
Name
R/W
Description
<0>
CYR2
R/W
MSB of 3bit Remote 2 Cycle Value. The other two bits of the code reside in Dynamic T
MIN
Control Register 2 (Reg. 0x37). These three bits define the delay time between making
subsequent T
MIN
adjustments in the control loop, in terms of 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.
<1>
V
CCP
LO
R/W
V
CCP
LO = 1. When the power is supplied from 3.3 V STANDBY and the core voltage (V
CCP
)
drops below its V
CCP
low limit value (Reg. 0x46), the following occurs:
" Status Bit 1 in Status Register 1 gets set
" SMBALERT
gets generated if enabled
" PROCHOT
monitoring is disabled
" Dynamic T
MIN
control is disabled
" The device is prevented from entering shutdown
" Everything reenabled once V
CCP
increases above V
CCP
low limit
<2>
PHTR1
R/W
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. This 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
Tegister reflects its programmed value.
<3>
PHTL
R/W
PHTL = 1 copies the local channels current temperature to the Local 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.
PHTL = 0 ignores any THERM
assertions on the THERM
pin. The Local Temperature
Operating Point Register reflects its programmed value.
<4>
PHTR2
R/W
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 system performance
being affected.
PHTR2 = 0 ignores any THERM
assertions on the THERM
pin. The Remote 2 Operating Point
Register reflects its programmed value.
<5>
R1T
R/W
R1T = 1 enables dynamic T
MIN
control on the Remote 1 Temperature channel. The chosen
T
MIN
value is dynamically adjusted based on the current temperature, operating point, and high
and low limits for this zone.
R1T = 0 disables dynamic T
MIN
control. The T
MIN
value chosen is not adjusted, and the
channel behaves as described in the Automatic Fan Control section.
<6>
LT
R/W
LT = 1 enables dynamic T
MIN
control on the Local Temperature channel. The chosen T
MIN
value is dynamically adjusted based on the current temperature, operating point, and high and
low limits for this zone.
LT = 0 disables dynamic T
MIN
control. The T
MIN
value chosen is not adjusted, and the channel
behaves as described in the Automatic Fan Control section.
<7>
R2T
R/W
R2T = 1 enables dynamic T
MIN
control on the Remote 2 Temperature channel. The chosen
T
MIN
value is dynamically adjusted based on the current temperature, operating point, and high
and low limits for this zone.
R2T = 0 disables dynamic T
MIN
control. The T
MIN
value chosen is not adjusted, and the
channel behaves as described in the Automatic Fan Control section.
1. This register becomes readonly when the Configuration Register 1 Lock bit is set to 1. Further attempts to write to this register have no effect.
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