2 ac offset calibration flow diagram, An366, Figure 40. meter test equipment – Cirrus Logic AN366 User Manual

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AN366

6.2.2 AC Offset Calibration Flow Diagram
The following flow diagram shows the implemented of AC offset calibration using the CDB5484U and a PC
as the controller. The MTE Meter Test Equipment source is used to provide the source voltage and no load
current. Each step of the flow shows the CDB5484 GUI screen capture of execution and reading results.
The register writes and reads are all identified for easy compares to the GUI screen.

REMOVE LOAD CURRENT
(See Figure 40.)

Figure 40. Meter Test Equipment

CLEAR DRDY in INTERRUPT STATUS
SDI = 0x80

0x57 0xFFFFFF

Write INT STATUS DRDY

SDO = 0xFF

0xFF 0x800000

(Set DRDY INT) (page 0, register 23)

FROM MAIN

FLOW

CLEAR DRDY

REMOVE

LOAD CURRENT

Tsettle = 2000

SampleCount

N = 16000

Shown

Main

Flow