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參數(shù)資料
| 型號(hào)： | ADT7318ARU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT |
| 封裝： | QSOP-16 |
| 文件頁(yè)數(shù)： | 11/24頁(yè) |
| 文件大?。?/td> | 279K |
| 代理商： | ADT7318ARU |
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ADT7316/7317/7318
–19–
REV. PrH
Preliminary Technical Data
PRELIMINARY TECHNICAL DATA
DAC D HIGH REGISTER
This 8-bit read/write register contains the digital data for
DAC D to convert to an analog representation. As the
ADT7318 has only an 8-bit DAC this register is all that is
is need for it’s DAC D. But in the case of the ADT7316
(12-Bit) and ADT7317 (10-Bit) this register contains the
8 MSBs of the DAC D word.
Table xx. DAC D High Register
D7
D6
D5
D4
D3
D2
D1
D0
M S B B6
B5
B4
B3
B2
B1
B0
DAC D LOW REGISTER (ADT7316/17 ONLY)
This 8-bit read/write register conatins the LSBs of the
DAC D word. In the case of the ADT7317 the 2 LSBs are
stored here and for the ADT7316 the 4 LSBs are stored
here.
Table xx. ADT7317 DAC D Low Register
D7
D6
D5
D4
D3
D2
D1
D0
B 1
L S B
00
000
0
Table xx. ADT7316 DAC D Low Register
D7
D6
D5
D4
D3
D2
D1
D0
B3
B2
B1
LSB
0
ADT7316/7317/7318 SERIAL INTERFACE
There are two serial interfaces that can be used on this
part, I
2C and SPI. The first valid serial communication
protocol selects the type of interface. The following sec-
tions describe in detail how to use these interfaces.
I
2C SERIAL INTERFACE
Like all I
2C-compatible devices, the ADT7316/7317/7318
has an 7-bit serial address. The four MSBs of this address
for the ADT7316/7317/7318 are set to 1001. The three
LSBs are set by pin 11, ADD. The ADD pin can be con-
figured three ways to give three different address options;
low, floating and high. Setting the ADD pin low gives a
serial bus address of 1001 000, leaving it floating gives the
address 1001 001 and setting it high gives the address
1001 010.
The serial bus protocol operates as follows:
SDA
NO ACK. BY
MASTER
START BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE
FRA ME 2
SINGL E DATA BYTE FROM ADT7316/17/18
ACK. BY
ADT7316/17/18
19
1
9
D7
D6
D5
D4
D3
D2
D1
D0
R/
9
A0
A1
A2
1
0
1
SCL
STOP BY
MASTER
0
Figure xx. I2C - Reading a single byte of data from a selected register
D7
D6
D5
D4
D3
D2
D1
D0
ACK. BY
ADT7316/17/18
STOP BY
MASTER
FRAME 4
DATA BYTE
SCL (CONTINUED)
SDA (CONTINUED)
R/
9
1
SCL
SDA
0
1
A2
A1
A 0
P7
P6
P5
P4
P3
P2
P1
P0
ACK. BY
ADT7316/17/18
START BY
MASTER
FRAME 1
SERIAL BUS ADDRESS BYTE
FRAME 2
ADDRESS POINTER REGISTER BYTE
19
1
ACK. BY
ADT7316/17/18
9
1
9
1
FRAME 3
DATA BYTE
D7
D6
D5
D4
D3
D2
D1
D0
ACK. BY
ADT7316/17/18
Figure xx. I2C - Writing to the Address Pointer followed by two data bytes to two Registers with Auto-Increment enabled
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