ADE9078ACPZ datasheet(73/108 Pages) AD

73 / 108 page

ADE9078

Data Sheet

Rev. 0 | Page 72 of 107

Example 3: Fixed Data Rate Data, Single Address Read

Mode

In this example, WFB_CAP_SEL = 1 and BURST_CHAN =

1111 in the WFB_CFG register, which indicates that there is

fixed data rate data in the waveform buffer, and the user wants

to read out one single address. A command is sent to read

Address 0x801, which is interpreted as a read to Address 0x801. The

first 32 SPI clocks return the VA waveform from Address 0x801,

followed by CRC if BURST_EN = 0. If BURST_EN = 1, the VA

waveform data from Address 0x801 is repeated again. This

example is depicted in Figure 112.

Example 4: Resampled Data, Single Address Read Mode

In this example, WFB_CAP_SEL = 0 and BURST_CHAN =

1111 in the WFB_CFG register, which indicates that there is

resampled data in the waveform buffer, and the user wants to read

out one a single address. A command is sent to read Address 0x801,

which is interpreted as a read to Address 0x801. The first 16 SPI

clocks return the VA waveform from Address 0x801, followed

by the IA waveform from Address 0x801, and, finally, the CRC

if BURST_EN = 0. If BURST_EN = 1, the VA and IA waveform

data from Address 0x801 is repeated again. This example is

depicted in Figure 113.

SCLK

MOSI

CMD_HDR = 0x8018

MISO

IA AT 0x800, 32 BITS

IA AT 0x808, 32 BITS

VA AT 0x801, 32 BITS IB AT 0x802,32 BITS VB AT 0x803, 32 BITS

IN AT 0x806, 32 BITS

Figure 110. Waveform Buffer SPI Burst Read of Fixed Data Rate Samples, with BURST_CHAN = 0000, to Read out All Channels (the Default State of the MOSI Pin

Depends on the Master SPI Device; It Is Assumed to Be High (Logic 1))

SCLK

MOSI

MISO

CMD_HDR = 0x8018

IC AT 0x802, 16 BITS

VC AT 0x802, 16 BITS

IC AT 0x806, 16 BITS

VC AT 0x806, 16 BITS

IC AT 0x80A, 16 BITS

Figure 111. Waveform Buffer SPI Burst Read of Resampled Data, with BURST_CHAN = 0011, to Read out IC and VC Data

SCLK

MOSI

MISO

CMD_HDR = 0x8018

VA AT 0x801, 32 BITS

CRC, 16 BITS

0 15

BURST_EN = 0

ADDRESS 0x800 TO 0xFFF

BURST_CHAN = 1111

BURST_EN = 1

ADDRESS 0x800 TO 0xFFF

BURST_CHAN = 1111

VA AT 0x801, 32 BITS

Figure 112. Waveform Buffer SPI Single Address Read of Fixed Rate Data with BURST_CHAN = 1111

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