ADT7320UCPZ-R2 datasheet(19/24 Pages) AD

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Preliminary Technical Data

ADT7320

Rev. PrA | Page 19 of 24

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.

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.

DIN

8-BIT DATA

1213

1516

SCLK

R/W

CONT

READ

8-BIT COMMAND BYTE

Figure 16. Writing to an 8-Bit Register

DIN

16-BIT DATA

SCLK

D14

D13

R/W

CONT

READ

D12

D10

D11

D15

8-BIT COMMAND BYTE

Figure 17. Writing to a 16-Bit Register

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