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| 型号： | ADT7468ARQZ-REEL |
| 厂商： | ON Semiconductor |
| 文件页数： | 68/81页 |
| 文件大小： | 0K |
| 描述： | IC REMOTE THERMAL CTRLR 24QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi Product Obsolescence 11/Feb/2009 |
| 标准包装： | 2,500 |
| 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： | ±2°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： | 带卷 (TR) |
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ADT7468
Table 28. Register 0x42—Interrupt Status Register 2 (Power-On Default = 0x00)
Bit
<0>
Name
12V/VC
R/W
Read only
Description
A one indicates that the 12 V high or low limit has been exceeded. This bit is cleared on a read of the status
register only if the error condition has subsided. If Pin 21 is configured as VID5, this bit is the VID change
bit. This bit is set when the levels on VID0 to VID5 are different than they were 11 μs previously. This pin
can be used to generate an SMBALERT whenever the VID code changes.
<1>
OVT
Read only
OVT = 1 indicates that one of the THERM overtemperature limits has been exceeded. This bit is cleared on a
read of the status register when the temperature drops below THERM ? T HYST .
<2>
FAN1
Read only
FAN1 = 1 indicates that Fan 1 has dropped below minimum speed or has stalled. This bit is not set when
the PWM 1 output is off.
<3>
FAN2
Read only
FAN2 = 1 indicates that Fan 2 has dropped below minimum speed or has stalled. This bit is not set when
the PWM 2 output is off.
<4>
FAN3
Read only
FAN3 = 1 indicates that Fan 3 has dropped below minimum speed or has stalled. This bit is not set when
the PWM 3 output is off.
<5>
F4P
Read only
When Pin 14 is programmed as a TACH4 input, F4P = 1 indicates that Fan 4 has dropped below minimum
speed or has stalled. This bit is not set when the PWM3 output is off.
Read/write
Read only
When Pin 14 is programmed as a GPIO output, writing to this bit determines the logic output of the GPIO.
If Pin 14 is configured as the THERM timer input for THERM monitoring, then this bit is set when the THERM
assertion time exceeds the limit programmed in the THERM limit register (Reg. 0x7A).
<6>
<7>
D1
D2
Read only
Read only
D1 = 1 indicates either an open or short circuit on the Thermal Diode 1 inputs.
D2 = 1 indicates either an open or short circuit on the Thermal Diode 2 inputs.
Table 29. Register 0x43-VID Register (Power-On Default = 0x00)
Bit
<4:0>
Name
VID[4:0]
R/W
Read-only
Description
The VID[4:0] inputs from the CPU indicate the expected processor core voltage. On power-up, these bits
reflect the state of the VID pins, even if monitoring is not enabled.
<5>
VID5
Read-only
Reads VID5 from the CPU when Bit 7 = 1. If Bit 7 = 0, then the VID5 bit always reads back 0 (power-on
default).
<6>
THLD
Read/write
Selects the input switching threshold for the VID inputs.
THLD = 0 selects a threshold of 1 V (V OL < 0.8 V, V IH > 1.7 V).
THLD = 1 lowers the switching threshold to 0.6 V (V OL < 0.4 V, V IH > 0.8 V).
<7>
VIDSEL
Read/write
VIDSEL = 0 configures Pin 21 as the 12 V measurement input (default).
Table 30. Voltage Limit Registers 1
Register Address
0x44
0x45
0x46
0x47
0x48
0x49
0x4A
0x4B
0x4C
0x4D
R/W
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Read/write
Description 2
2.5 V
2.5 V
V CCP low limit
V CCP high limit
V CC low limit
V CC high limit
5 V low limit
5 V high limit
12 V low limit
12 V high limit
Power-On Default
0x00
0xFF
0x00
0xFF
0x00
0xFF
0x00
0xFF
0x00
0xFF
1
2
Setting the Configuration Register 1 lock bit has no effect on these registers.
High Limits: An interrupt is generated when a value exceeds its high limit (>comparison). Low limits: An interrupt is generated when a value is equal to or below its low
limit ( ≤ comparison).
Rev. 3 | Page 68 of 81 | www.onsemi.com
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| ADT7468ARQZ-REEL7 | 功能描述:IC REMOTE THERMAL CTRLR 24QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:dBCool® 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6 |
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