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參數(shù)資料
| 型號(hào)： | TC77-3.3MOA |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | Thermal Sensor with SPI Interface |
| 中文描述： | 熱傳感器，SPI接口 |
| 文件頁(yè)數(shù)： | 10/22頁(yè) |
| 文件大?。?/td> | 374K |
| 代理商： | TC77-3.3MOA |
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TC77
DS20092A-page 10
2002 Microchip Technology Inc.
FIGURE 3-2:
Temperature Register).
Temperature Read Timing Diagram - (Reading only the first 13 Bits of the
FIGURE 3-3:
Diagram.
Temperature Read Followed By A Write To The Configuration Register Timing.
It is recommended that the user write all ‘
0
’s or all ‘
1
’s
to the Configuration register. While the following codes
can be transmitted to the TC77, any other code may
put the TC77 into a test mode reserved by Microchip for
calibration and production verification tests.
00 hex
01 hex
03 hex
07 hex
0F hex
1F hex
3F hex
7F hex
FF hex
The following communication steps can be used to
obtain the Manufacturer's ID and put the device into the
Continuous Conversion mode. The Manufacturer’s ID
register is only accessible for a read operation, if the
TC77 is in Shutdown mode.
1.
2.
CS goes low to initiate the communication cycle.
Read 16 bits of temperature data from the
Temperature register.
Write 16 bits of data (i.e. XXFF hex) to the Con-
figuration register to enter Shutdown mode.
Read the 16 bits from the Manufacturer's ID reg-
ister (C15:C8 = 54 hex) to verify that the sensor
is a Microchip device.
Write 8 to 16 bits of data (
00
or
0000
hex) to
enter Continuous Conversion Mode.
Return CS high to terminate the communication
cycle.
3.
4.
5.
6.
The time between a complete temperature conversion
and data transmission is approximately 300 msec.
CS
CLK
SI/O
t
CS-SCK
HI-Z
HI-Z
T
12
T
11
T
10
T
9
T
7
T
6
T
5
T
4
T
3
T
2
T
1
T
0
1
8
13
T
8
CS
CLK
SI/O
t
CS-SCK
HI-Z
1
8
8
8
8
1
HI-Z
1
1
HI-Z
TEMPERATURE REGISTER
Notes:
1.
Bit 2 = 0 during power-up for the first
temperature conversion.
2.
Bit 2 =1 after the completion of the first tem-
perature conversion following power-up or a
reset event.
3.
Bits 1 and 0 are “DON”T CARES”.
CONFIGURATION REGISTER
Notes:
1.
2.
XX00 = Continuous Conversion Mode
XXFF = Shutdown Mode
T
12
T
11
T
10
T
9
T
8
T
7
T
6
T
5
T
4
T
3
T
2
T
1
T
0
BIT
2
C
15
C
14
C
13
C
12
C
11
C
10
C
9
C
8
C
7
C
6
C
5
C
4
C
3
C
2
C
1
C
0
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