AD7323 datasheet(23/37 Pages) AD

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AD7323

Data Sheet

Rev. B | Page 22 of 36

REGISTERS

The AD7323 has three programmable registers: the control

are write-only registers.

ADDRESSING REGISTERS

A serial transfer on the AD7323 consists of 16 SCLK cycles. The

three MSBs on the DIN line during the 16 SCLK transfer are

decoded to determine which register is addressed. The three

MSBs consist of the write bit, the Register Select 1 bit, and the

determine which of the three on-board registers is selected. The

write bit determines if the data on the DIN line following the

bit is 1, the bits load into the register addressed by the register

select bits. If the write bit is 0, the data on the DIN line does not

load into any register.

Combinations of the write bit, the Register Select 1 bit, and the

registers for Analog Devices internal use only. Accessing these

registers may lead to unspecified operation of the device.

Table 8. Decoding Register Select Bits and Write Bit

Write

Description

Data on the DIN line during this serial transfer is ignored.

This combination selects the control register. The subsequent 12 bits are loaded into

the control register.

This combination selects the range register. The subsequent eight bits are loaded into

the range register.

This combination selects the sequence register. The subsequent four bits are loaded

into the sequence register.

AD7323 Datasheet(PDF) 23 Page - Analog Devices