ADT7518ARQ-REEL Analog Devices Inc, ADT7518ARQ-REEL Datasheet - Page 36

• Manufacturer Part Number: ADT7518ARQ-REEL
• Description: IC SENSOR TEMP W/ADC/DAC 16QSOP
• Manufacturer: Analog Devices Inc

Specifications of ADT7518ARQ-REEL

• Rohs Status: RoHS non-compliant
• Function: Temp Monitoring System (Sensor)
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: -40°C ~ 120°C, External Sensor
• Output Type: I²C™, MICROWIRE™, QSPI™, SPI™
• Output Alarm: No
• Output Fan: No
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 120°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP

ADT7518
Write Operation
Figure 59 shows the timing diagram for a write operation to the
ADT7518. Data is clocked into the registers on the rising edge
of SCLK. When the CS line is high, the DIN and DOUT lines
are in three-state mode. Only when the CS goes from a high to a
low does the part accept any data on the DIN line. In SPI mode,
the address pointer register is capable of autoincrementing to
the next register in the register map without having to load the
address pointer register each time. In Figure 59, the register
address portion gives the first register that will be written to.
Subsequent data bytes will be written into sequential writable
registers. Thus, after each data byte has been written into a
register, the address pointer register autoincrements its value to
the next available register. The address pointer register will
autoincrement from 00h to 3Fh and will loop back to start again
at 00h when it reaches 3Fh.
SDA
SCL
SDA
SCL
START BY
MASTER
SDA
START BY
SCL
MASTER
START BY
MASTER
1
1
1
1
Figure 57. I
1
1
Figure 56. I
0
0
0
SERIAL BUS ADDRESS BYTE
SERIAL BUS ADDRESS BYTE
SERIAL BUS ADDRESS BYTE
0
2
C—Writing to the Address Pointer Register Followed by a Single Byte of Data to the Selected Register
2
0
0
C—Writing to the Address Pointer Register to Select a Register for a Subsequent Read Operation
1
FRAME 1
FRAME 1
1
1
FRAME 1
Figure 58. I
A2
A2
SDA (CONTINUED)
SCL (CONTINUED)
A2
A1
A1
2
A1
C—Reading a Single Byte of Data from a Selected Register
A
A0
0
A0
R/W
R/W
ADT7518
ACK. BY
R/W
Rev. A | Page 36 of 40
ADT7518
ACK. BY
ADT7518
ACK. BY
9
9
D 7
9
1
D7
P7
1
1
D 6
P7
1
Read Operation
Figure 60 to Figure 62 show the timing diagrams necessary to
accomplish correct read operations. To read back from a reg-
ister, first write to the address pointer register with the address
of the register to be read from. This operation is shown in
Figure 60. Figure 61 shows the procedure for reading back a
single byte of data. The read command is first sent to the part
during the first eight clock cycles. During the following eight
clock cycles, the data contained in the register selected by the
address pointer register is output onto the D
output onto the D
shows the procedure when reading data from two sequential
registers. Multiple data reads are possible in the SPI interface
mode as the address pointer register is autoincremental. The
address pointer register will autoincrement from 00h to 3Fh and
will loop back to start again at 00h when it reaches 3Fh.
D6
P6
P6
D5
SINGLE DATA BYTE FROM ADT7518
ADDRESS POINTER REGISTER BYTE
D5
P5
ADDRESS POINTER REGISTER BYTE
D 4
P5
DATA BYTE
D4
P4
FRAME 3
P4
D3
FRAME 2
FRAME 2
D3
P3
FRAME 2
OUT
P3
D 2
D2
line on the falling edge of SCLK. Figure 62
P2
P2
D 1
D1
P1
D0
P1
NO ACK. BY
D0
MASTER
P0
ADT7518
ACK. BY
P0
9
9
ADT7518
ACK. BY
9
ADT7518
ACK. BY
9
STOP BY
STOP BY
MASTER
MASTER
OUT
STOP BY
MASTER
line. Data is