Maxim Integrated 71M6534 Energy Meter IC Family Software - Manual (Page 51)

71M653X Software User’s Guide
Feature
Feature Code
Size
1
φ
3
φ Description
Reception of
calibration
parameters via
the serial interface 2.0KB Y Y Simple serial calibration system to read and set data
and calibration values, including CE data, MPU
calibration and RTC settings. Meter operation is not
required when this feature is in use. Intel hex records
are used.
Count of
calibrations since
first cold reset. 01.KB Y Y Counts calibrations. 0..254, 255 = “many”. The count
is protected by a checksum. The first cold reset is
detected by an invalid EEPROM. This is a tamper-
detection feature.
Auto-calibration 3.5KB Y Y Internal automatic calibration, from command line
interface. Calibration adjusts phase, as in the “fast
calibration” described in the DBUM.
Command Line
Interface (CLI) 23KB Y Y Text-based commands give access to CE data, RAM,
IO registers. Includes on-line help. No profile or load
features..
Save registers
when sag occurs 0.75KB Y Y Saves power and error registers on sag detection.
Save to flash
memory 0.9KB N/opt N/opt Compilation option to save calibration, error and
power register data to internal flash.
When a flash area is used-up, it is marked, and the
next one is used. When all areas are used up, an
error is recorded and write operations are inhibited.
Save to and
restore from
EEPROM 0.7KB Y Y Saves and restores calibration, error and power
register data to and from EEPROM.
When an EEPROM area is used-up, it is marked, and
the next one is used. When all areas are used up, an
error is recorded and write operations are inhibited.
Checksum 0.2KB Y Y Each revenue-affecting data area is protected by a
simple checksum
0.4KB Y Y Errors are recorded. Error data is protected by a
checksum. The time stamp (minute, hour, day and
month of assertion) and the bit number of the five
most recent errors are saved. Error recording
and saving
Microwire
EEPROM 0.2KB N/opt N/opt Compilation option
I2C EEPROM 0.2KB Y Y For an Atmel AT24C256.
Table 5-9: Calibration and Various Services
5.3 PROGRAM FLOW
This section should be read with a PC that has demo code’s source code installed. This section is supposed to help
you learn to find and change things in the demo code, not just learn theory.
So please, put the demo code sources on a PC now, and sit next to it!
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