參數(shù)資料
型號(hào)： ADT7317ARU
廠商： ANALOG DEVICES INC
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 3Cel, RECTANGULAR, SURFACE MOUNT
封裝： QSOP-16
文件頁(yè)數(shù)： 15/24頁(yè)
文件大?。?/td> 279K
代理商： ADT7317ARU
–22–
REV. PrH
Preliminary Technical Data
PRELIMINARY TECHNICAL DATA
ADT7316/7317/7318
D7
D6
D5
D4
D3
D2
D1
D0
DATA BYTE
18
D
IN (CONTINUED )
SCL K (CONTINUED)
CS (CONTINUED)
D7
SCLK
D
IN
D6
D5
D4
D3
D2
D1
D6
D5
D4
D 3
D2
D1
D0
START
WRITE COMMAND
REGISTER ADDRESS
18
1
8
CS
D0
D7
Figure xx. SPI - Writing to the Address Pointer Register followed by a single byte of data to the selected register
D7
SCLK
D
IN
D6
D5
D4
D3
D2
D1
D6
D5
D4
D3
D2
D1
D0
START
WRITE COMMAND
R EGISTER ADDRESS
18
1
8
CS
D0
D7
STOP
Figure xx. SPI - Writing to the Address Pointer Register to select a register for a subsequent read operation
the part will ignore all data bytes after the first one. To
overwrite the contents of a register another write operation
will have to be performed.
Read Operation
Figures xx to xx show the timing diagrams necessary to
acomplish correct read operations. To read back from a
register you first have to write to the Address Pointer Reg-
ister with the address of the register you wish to read
from. This operation is shown in Figure xx. Figure xx
shows the procedure for reading back a single byte of data.
The read command is first sent to the part during the first
8 clock cycles, during the following 8 clock cycles the
data contained in the register selected by the Address
Pointer register is outputted onto the DOUT line. Data is
outputted onto the DOUT line on the rising edge of
SCLK. Figure xx. shows the procedure when reading data
from two sequential registers. Multiple data reads is only
possible if the auto-increment for the Address Pointer
Register has been enabled. If the auto-increment is dis-
abled then the second data byte in Figure xx. will contain
the same as the first data byte because it would have come
from the same register.
OTI Interrupt
The
OTI pin can be used to signal an over temperature
event. If the temperature in either the Internal or External
Temperature Value Registers exceeds the THIGH (Internal
or External) Registers then the
OTI line goes active. Of
course nothing happens if the
OTI Interrupt is disabled,
D7 of Configuration Register 1. The
OTI interrupt will
be cleared when the temperature goes below the value in
the TLOW (Internal or External) registers, depending on
whether the internal or external temperature sensor caused
the interrupt. The
OTI interrupt can also be cleared by
setting D3 of Configuration Register 2.
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