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參數(shù)資料
| 型號： | EMC2103-2-AP-TR |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, QCC16 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, QFN-16 |
| 文件頁數(shù)： | 62/89頁 |
| 文件大?。?/td> | 1243K |
| 代理商： | EMC2103-2-AP-TR |
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RPM-Based Fan Controller with HW Thermal Shutdown
Datasheet
SMSC EMC2103
65
Revision 0.90 (08-19-08)
DATASHEET
If a TACH Target setting is set above the Valid TACH Count setting, then that setting will be ignored
and the algorithm will use the current fan drive setting.
The Valid TACH Count Register is software locked.
6.29
Fan Drive Fail Band Registers
The Fan Drive Fail Band Registers store the number of tach counts used by the Fan Drive Fail
detection circuitry. This circuitry is activated when the fan drive setting high byte is at FFh. When it is
enabled, the actual measured fan speed is compared against the target fan speed.
This circuitry is used to indicate that the target fan speed at full drive is higher than the fan is actually
capable of reaching. If the measured fan speed does not exceed the target fan speed minus the Fan
Drive Fail Band Register settings for a period of time longer than set by the DRIVE_FAIL_CNTx[1:0]
bits then the DRIVE_FAIL status bit will be set and an interrupt generated.
6.30
TACH Target Register
The TACH Target Register holds the target tachometer value that is maintained by the RPM based
Fan Speed Control Algorithm.
The value in the TACH Target Register will always reflect the current TACH Target value. If the Look
Up Table is active and configured to operate in RPM Mode, then this register will be read only. Writing
to this register will have no affect and the data will not be stored.
If the algorithm is enabled then setting the TACH Target Register to FFh will disable the fan driver (set
the PWM duty cycle to 0%). Setting the TACH Target to any other value (from a setting of FFh) will
cause the algorithm to invoke the Spin Up Routine after which it will function normally.
Table 6.46 Fan Drive Fail Band Registers
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
4Ah
R/W
Fan Drive
Fail Band
Low Byte
16
8
4
2
1
-
00h
4Bh
R/W
Fan Drive
Fail Band
High Byte
4096
2048
1024
512
256
128
64
32
00h
Table 6.47 TACH Target Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
4Ch
R/W
Fan TACH
Target Low
Byte
16
84
21
-
F8h
4Dh
R/W
TACH Target
4096
2048
1024
512
256
128
64
32
FFh
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| EMC2103-3-KP | 制造商:SMSC 制造商全稱:SMSC 功能描述:RPM-Based Fan Controller with HW Thermal Shutdown |
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| EMC2103-4-AP-TR | 功能描述:板上安裝溫度傳感器 RPM-BASED FAN CTRL HW THRML SHUTDWN RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| EMC2104 | 制造商:SMSC 制造商全稱:SMSC 功能描述:Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown |
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