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參數資料
| 型號： | TMP401AIDGKTG4 |
| 廠商： | Texas Instruments |
| 文件頁數： | 12/28頁 |
| 文件大小： | 881K |
| 描述： | IC TEMP SENSOR DGTL OUT 8-MSOP |
| 標準包裝： | 250 |
| 功能： | 溫度監控系統（傳感器） |
| 傳感器類型： | 內部和外部 |
| 感應溫度： | -40°C ~ 125°C |
| 精確度： | ±3°C 本地（最大），±5°C 遠程（最大） |
| 拓撲： | ADC，比較器，寄存器庫 |
| 輸出類型： | 2 線 SMBus? |
| 輸出警報： | 是 |
| 輸出風扇： | 是 |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 8-MSOP |
| 包裝： | 帶卷 (TR) |
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TMP401
SBOS371A AUGUST 2006 REVISED OCTOBER 2007
www.ti.com
12
CONFIGURATION REGISTER
The Configuration Register sets the temperature range,
controls Shutdown mode, and determines how the
ALERT
/THERM2
pin functions. The Configuration
Register is set by writing to pointer address 09h and read
by reading from pointer address 03h.
The MASK bit (bit 7) enables or disables the ALERT
pin
output if AL/TH = 0. If AL/TH = 1 then the MASK bit has no
effect. If MASK is set to 0, the ALERT
pin goes low when
one of the temperature measurement channels exceeds
its high or low limits for the chosen number of consecutive
conversions. If the MASK bit is set to 1, the TMP401
retains the ALERT
pin status, but the ALERT
pin will not
go low.
The shutdown (SD) bit (bit 6) enables or disables the
temperature measurement circuitry. If SD = 0, the TMP401
converts continuously at the rate set in the Conversion
Rate Register. When SD is set to 1, the TMP401
immediately stops converting and enters a shutdown
mode. When SD is set to 0 again, the TMP401 resumes
continuous conversions. A single conversion can be
started when SD = 1 by writing to the One-Shot Register.
The AL/TH bit (bit 5) controls whether the ALERT
pin
functions in ALERT mode or THERM2 mode. If AL/TH = 0,
the ALERT
pin operates as an interrupt pin. In this mode, the
ALERT
pin goes low after the set number of consecutive
out-of-limit temperature measurements occur.
If AL/TH = 1, the ALERT
/THERM2
pin implements a
THERM function (THERM2
). In this mode, THERM2
functions similar to the THERM
pin except that the local
high limit and remote high limit registers are used for the
thresholds. THERM2
goes low when either RHIGH or
LHIGH is set.
The temperature range is set by configuring bit 2 of the
Configuration Register. Setting this bit low configures the
TMP401 for the standard measurement range (0癈 to
+127癈); temperature conversions will be stored in the
standard binary format. Setting bit 2 high configures the
TMP401 for the extended measurement range (55癈 to
+150癈); temperature conversions will be stored in the
extended binary format (see Table 1).
The remaining bits of the Configuration Register are
reserved and must always be set to 0. The power-on reset
value for this register is 00h. Table 5 summarizes the bits
of the Configuration Register.
Table 5. Configuration Register Bit Descriptions
CONFIGURATION REGISTER (Read = 02h, Write = NA)
BIT
NAME
FUNCTION
POWER-ON RESET VALUE
7
MASK
0 = ALERT Enabled
1 = ALERT Masked
0
6
SD
0 = Run
1 = Shut Down
0
5
AL/TH
0 = ALERT Mode
1 = THERM Mode
0
4, 3
Reserved
0
2
Temperature Range
0 = 0癈 to +127癈
1 = 55癈 to +150癈
0
1, 0
Reserved
0
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