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| 型号： | ADT7490ARQZ-R7 |
| 厂商： | ON Semiconductor |
| 文件页数： | 67/75页 |
| 文件大小： | 0K |
| 描述： | IC THERM MON FAN CTLR 24-QSOP |
| 产品变化通告： | MFG CHG Notification ADI to ON Semi QSOP 24ld Pkg (MSL) Change 17/Jun/2010 Product Discontinuation 30/Sept/2011 |
| 标准包装： | 1,000 |
| 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 ~ 125°C |
| 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 ~ 3.6 V |
| 工作温度： | -40°C ~ 125°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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ADT7490
Table 96. REGISTER 0x7C ? CONFIGURATION REGISTER 5 (POWER-ON DEFAULT = 0x01)
Bit No.
[0]
[1]
[3:2]
[4]
[5]
Mnemonic
TWOS
COMPL
Temp Offset
RES
P ECI R 1
THERM
Output Only
R1 THERM
Output Only
R/W (Note 1)
R/W
R/W
R/W
R/W
R/W
Description
TWOS COMPL = 1 sets the temperature range to the twos complement temperature range.
TWOS COMPL = 0 changes the temperature range to the Offset 64 temperature range.
When this bit is changed, the ADT7490 interprets all relevant temperature register values as
defined by this bit.
Temp Offset = 0 sets offset range to ? 63 ? C to +64 ? C with 0.5 ? C resolution.
Temp Offset = 1 sets offset range to ? 63 ? C to +127 ? C with 1 ? C resolution.
These settings apply to Register 0x70, Register 0x71, and Register 0x72 (Remote 1, Internal,
and Remote 2 Temperature offset registers. Note that PECI offset is always 1 ? C resolution).
Reserved.
PECI R1 = 1 enables THERM assertions when the PECI temperature read is higher than the
PECI T CONTROL limit and the THERM pin is bidirectional. If THERM is configured as an
output, the THERM timer limit register (0x7A) should be set to 0xFF to avoid unwanted alerts
from being generated.
PECI R1 = 0 indicates that the THERM pin is configured as a timer input only. Can also be
disabled by writing one of the following values to the PECI T CONTROL limit register (0x3D):
Writing ? 64 ? C in Offset 64 mode.
Writing ? 128 ? C in twos complement mode.
R1 = 1 enables THERM assertions when the Remote 1 temperature read is higher than the
Remote 1 THERM limit and the THERM pin is bidirectional. If THERM is configured as an
output, the THERM timer limit (Register 0x7A) should be set to 0xFF to avoid unwanted
alerts from being generated.
R1 = 0 indicates that the THERM pin is configured as a timer input only. Can also be disabled
by writing one of the following values to the Remote 1 THERM Temp Limit register (0x6A):
Writing ? 64 ? C in Offset 64 mode.
Writing ? 128 ? C in twos complement mode.
[6]
[7]
Local
THERM
Output Only
R2 THERM
Output Only
R/W
R/W
R1 = 1 enables THERM assertions when the Local temperature read is higher than the Local
THERM limit and the THERM pin is bidirectional. If THERM is configured as an output, the
THERM timer limit (Register 0x7A) should be set to 0xFF to avoid unwanted alerts from
being generated.
R1 = 0 indicates that the THERM pin is configured as a timer input only. Can also be disabled
by writing one of the below values to the local THERM limit register (0x6B):
Writing ? 64 ? C in Offset 64 mode.
Writing ? 128 ? C in twos complement mode.
R1 = 1 enables THERM assertions when the Remote 2 temperature read is higher than the
Remote 2 THERM limit and the THERM pin is bidirectional. If THERM is configured as an
output, the THERM timer limit (Register 0x7A) should be set to 0xFF to avoid unwanted
alerts from being generated.
R1 = 0 indicates that the THERM pin is configured as a timer input only. C an also be
disabled by writing one of the below values to the Remote 2 THERM temperature limit
register (0x6C):
Writing ? 64 ? C in Offset 64 mode.
Writing ? 128 ? C in twos complement mode.
1. This register becomes read-only when the Configuration Register 1 (0x40) Lock bit is set to 1. Any further attempts to write to this register
have no effect.
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