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ADE9178 데이터시트(PDF) 29 Page - Analog Devices

부품명 ADE9178
상세설명  Energy Management DSP with PEN Fault Detection
PDF  122 Pages
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Data Sheet
ADE9178
THEORY OF OPERATION
analog.com
Rev. A | 29 of 122
Support for Reading and Writing ADC
Registers
The ADE9178 provides support for reading and writing ADC regis-
ters by configuring the device field of the command. If the device
is a nonzero value less than 5, the read or write command is sent
to corresponding ADC. If the device field is 5, the same command
is sent to all ADCs in the daisy chain. ADC reads return two 8-bit
values, the value at the address in the command header and the
value at the consecutive address.
See Table 10 to relate ADC number to physical ADC channel,
for example, ADC1 relates to the ADC that is connected to the
ADC_MISO pin of the ADE9178.
For single ADC write, the protocol is the same as shown in Figure
34 except the register value in the Command Header and the
Register Value is stored in the lower 8 bits of the 32-bit register
(upper 24 bits are 0 padded). For multiple ADC write, it is important
to note that the same register value is written to all ADCs and
depending on how many ADCs are connected to ADE9178 the
response size changes.
Figure 41. Protocol to Read ADC Registers Individually
Figure 42. Protocol to Read ADC Registers Simultaneously (NUM_ADC = 0x1)



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