EVAL-AD7327CB AD [Analog Devices], EVAL-AD7327CB Datasheet - Page 22

• Manufacturer Part Number: EVAL-AD7327CB
• Description: 500 kSPS, 8-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC
• Manufacturer: AD [Analog Devices]

AD7327
REGISTERS
The AD7327 has four programmable registers: the control register, sequence register, Range Register 1, and Range Register 2.
These registers are write-only registers.
ADDRESSING REGISTERS
A serial transfer on the AD7327 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, Register Select 1 bit, and Register Select 2 bit. The register
select bits are used to determine which of the four on-board registers is selected. The write bit determines if the data on the DIN line
following the register select bits loads into the addressed register. If the write 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.
Table 8. Decoding Register Select Bits and Write Bit
Write
0
1
1
1
1
Register Select 1
0
0
0
1
1
Register Select 2
0
0
1
0
1
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 Range Register 1. The subsequent 8 bits are loaded into
Range Register 1.
This combination selects Range Register 2. The subsequent 8 bits are loaded into
Range Register 2.
This combination selects the sequence register. The subsequent 8 bits are loaded into
the sequence register.
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