Maxim Integrated 71M6534 Energy Meter IC Family Software - Manual (Page 47)

71M653X Software User’s Guide
There is a known defect in version 7.50a of the Keil compiler:
Memory types must be explicitly defined in local variables. Using a predefined type is not explicit
enough, i.e. "char xdata c;" is ok. "typedef char int8_t; ... int8_t data c;" is OK,
but "typedef char data int8d_t; ... int8d_t c;" is not OK.
5.2 DEMO CODE OPTIONS AND PROGRAM SIZE
Since the 71M6531 is single phase, and the 71M6534 is tree-phase, different versions of the Demo Code are provided
that take into account the different features (see Table 5-3). An attempt has been made to provide the most common
features in each version of the Demo Code. Flexibility is provided by the source code for users when recompiling the
source code: If a certain feature is not required, it can be left out and replaced with a different feature.
The object files contained in the Demo Kits have been generated with the following Keil compiler versions:
• C compiler: C51.exe, V8.05a
• Assembler: A51.exe, V8.00b
• Linker/Locator: BL51.exe, V6.05
• Librarian: LIB51.exe, V4.24
• Hex-converter: OH51.exe, V2.6
Version
Flash
Code Size
Description
Single Phase ~45KB Demonstrates a single phase meter. The software offers calibration and nonvolatile
energy registers. It utilizes one set of CE code for 1 element two wire meters, and
another set for 1 element three wire, and 2 element three wire delta.
Three Phase ~49KB Demonstrates a three-phase meter. The software is easy to reconfigure by recompiling.
It has calibration and nonvolatile energy registers. The software demonstrates a full
feature set.
Table 5-3: Demo Code Versions
In addition to providing flexibility, an attempt has been made to leave a certain amount of unoccupied memory space
when generating the Demo Code. This should provide some room for users who want to modify the Demo Code and
experiment with small changes.
The tables presented below show the features available for the three versions of the Demo Code plus the code size
required for each feature. Entries for code size are approximated and depend on code module combination.
Y means that the feature is implemented, N means that it is not. N/opt means that the feature may be implemented if
enough memory space is available.
Feature Code
Size
1
φ
3
φ Description
CT and shunt
resistors 1KB to
2.5KB
Y Y Configurations include all 2 element 3 wire delta, and
3 element 4 wire wye with neutral current. These
were selected for demonstration because they permit
easy measurements of individual elements.
Rogowski coils 2.5KB N N Needs special CE code; contact factory
Table 5-4: Current Sensing Options
v1.1v1.1 TERIDIAN Proprietary 47 of 116
© Copyright 2005-2008 TERIDIAN Semiconductor Corporation