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參數(shù)資料
| 型號(hào)： | TC74A7-5.0VCTTRG |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 338K |
| 描述： | IC DGTL THERM SNSR 5.0V SOT23A-5 |
| 標(biāo)準(zhǔn)包裝： | 3,000 |
| 功能： | 溫度監(jiān)控系統(tǒng)（傳感器） |
| 傳感器類型： | 內(nèi)部 |
| 感應(yīng)溫度： | -40°C ~ 125°C |
| 精確度： | ±3°C（最小值） |
| 拓?fù)洌?/td> | ADC（三角積分型），寄存器庫 |
| 輸出類型： | I²C?/SMBus? |
| 輸出警報(bào)： | 無 |
| 輸出風(fēng)扇： | 無 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | SC-74A，SOT-753 |
| 供應(yīng)商設(shè)備封裝： | SOT-23-5 |
| 包裝： | 帶卷 (TR) |
TC74
DS21462C-page 8
?2002 Microchip Technology Inc.
4.0
REGISTER SET AND
PROGRAMMERS MODEL
TABLE 4-1:
COMMAND BYTE
DESCRIPTION
(SMBUS/I
2
C READ_BYTE AND
WRITE_BYTE)
TABLE 4-2:
CONFIGURATION REGISTER
(CONFIG); 8 BITS, READ/
WRITE)
FIGURE 4-1:
DATA_RDY, SHDN
Operation Logic Diagram.
4.1
Temperature Register (TEMP),
8 Bits, READ ONLY
The binary value (2s complement format) in this regis-
ter represents temperature of the onboard sensor
following a conversion cycle. The registers are
automatically updated in an alternating manner.
TABLE 4-3:
TEMPERATURE REGISTER
(TEMP)
In temperature data registers, each unit value repre-
sents one degree (Celsius). The value is in 2s
complement binary format such that a reading of 0000
0000b corresponds to 0癈. Examples of this
temperature to binary value relationship are shown in
Table 4-4.
TABLE 4-4:
TEMPERATURE-TO-DIGITAL
VALUE CONVERSION
(TEMP)
4.2
Register Set Summary
The TC74 register set is summarized in Table 4-5. All
registers are 8 bits wide.
TABLE 4-5:
TC74 REGISTER SET
SUMMARY
Command Code
Function
RTR
00h Read Temperature (TEMP)
RWCR
01h Read/Write Configuration
(CONFIG)
Bit
POR
Function
Type
Operation
D[7]
0
STANDBY
Switch
Read/
Write
1 = standby,
0 = normal
D[6]
0
Data Ready * Read
Only
1 = ready
0 = not ready
D[5]-
D[0]
0
Reserved -
Always
returns zero
when read
N/A N/A
Note 1: *DATA_RDY bit RESET at power-up and
SHDN enable.
V
DD
DATA_RDY
SHDN
t
conv
t
conv
D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0]
MSB
X
X
X
X
X
X
LSB
Actual
Temperature
Registered
Temperature
Binary
Hex
+130.00癈
+127癈
0111 1111
+127.00癈
+127癈
0111 1111
+126.50癈
+126癈
0111 1110
+25.25癈
+25癈
0001 1001
+0.50癈
0癈
0000 0000
+0.25癈
0癈
0000 0000
0.00癈
0癈
0000 0000
-0.25癈
-1癈
1111 1111
-0.50癈
-1癈
1111 1111
-0.75癈
-1癈
1111 1111
-1.00癈
-1癈
1111 1111
-25.00癈
-25癈
1110 0111
-25.25癈
-26癈
1110 0110
-54.75癈
-55癈
1100 1001
-55.00癈
-55癈
1100 1001
-65.00癈
-65癈
1011 1111
Name
Description
POR
State
Read Write
TEMP
Internal Sensor
Temperature (2s
Complement)
0000
0000b
(1)
N/A
CONFIG
CONFIG
Register
0000
0000b
Note 1: The TEMP register will be immediately
updated by the A/D converter after the
DATA_RDY Bit goes high.
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