Maxim Integrated 71M6521BE Energy Meter IC Family Software - Manual (Page 42)

71M652X Software User’s Guide
Revision 1.7 TERIDIAN Proprietary 42 of 138
© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
Feature Code
Size
8KB 16KB 32KB Description
CT and shunt
resistors 1KB to
2.5KB
Y Y Y Configurations include one element, one phase, and
neutral current, as well as two elements with two
phases
Rogowski coils 2.5KB N N N Needs special CE code
Table 5-4: Current Sensing Options
Feature Code
Size
8KB 16KB 32KB Description
Chopping of
VREF 0.06KB Y Y Y Control of the chopping bit
Temperature
compensation of
VREF 0.1KB Y Y Y Digital compensation using the GAIN_ADJ input of
the CE, based on linear and quadratic temperature
coefficients
RTC compensa-
tion using mains
frequency 0.2KB N/opt N/opt N/opt Optional compensation of RTC by counting cycles on
mains.
Correction does not occur when frequency
measurement is inhibited by low voltages.
RTC constant
compensation 0.1KB Y N/opt Y Constant rate compensation only.
Full RTC
compensation 0.2KB N N/opt N/opt
2nd-order compensation of RTC to 1ppb, using
temperature.
Correction does not occur when the ADC mux is off-
line.
Temperature
measurement 0.0K Y Y Y Provides difference from calibration temperature to
0.1 C when calibrated
Table 5-5: Compensation Features
Feature Code
Size
8KB 16KB 32KB Description
Wh absolute
value Y Y Y Standard option of kilowatt hours, “3. 999999” The
annunciator 3 at the beginning is optional if no other
registers are supported.
Pulse output for
Wh absolute
value 0.23KB Y Y Y Standard option of 1 kh/pulse on both DIO 6 and DIO
2. 8K version’s pulse output is controlled by the CE
without MPU intervention.
VAn register 1KB N N/opt N/opt Optional volt-amperes, “ 999999”, replaces Wh
options
VAn pulse output 0.25KB N N/opt N/opt Optional volt-amperes, 1 kh/pulse, replaces Wh
options
Wh equation 0 0.2KB Y Y Y