ADT7320UCPZ AD [Analog Devices], ADT7320UCPZ Datasheet - Page 19

• Manufacturer Part Number: ADT7320UCPZ
• Manufacturer: AD [Analog Devices]

Preliminary Technical Data
WRITING DATA
Data is written to the ADT7320 in eight bits or 16 bits, depending
on the addressed register. The first byte written to the device is
the command byte, with the read/write bit set to 0. The master
then supplies the 8-bit or 16-bit input data on the DIN line. The
ADT7320 clocks the data into the register addressed in the
command byte on the positive edge of SCLK. The master
finishes the write by pulling CS high.
SCLK
DIN
CS
C7
0
1
SCLK
DIN
R/W
CS
C6
2
8-BIT COMMAND BYTE
REGISTER ADDR
C5
3
C7
C4
0
1
4
R/W
C6
C3
2
5
8-BIT COMMAND BYTE
REGISTER ADDR
CONT
READ
C5
C2
3
6
C4
C1
0
4
7
C3
C0
0
5
8
Figure 16. Writing to an 8-Bit Register
Figure 17. Writing to a 16-Bit Register
CONT
READ
C2
D15
6
9
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C1
D14
0
7
10
C0
D13
0
8
11
D7
D12
9
12
Figure 16 shows a write to an 8-bit register, and Figure 17 shows
a write to a 16-bit register.
The master must begin a new write transaction on the bus for
every register write. Only one register is written to per bus
transaction.
D6
D11
10
13
D5
D10
11
14
8-BIT DATA
16-BIT DATA
D4
D9
12
15
D3
D8
13
16
D2
D7
14
17
D1
15
D0
16
D2
22
D1
23
D0
ADT7320
24