Maxim Integrated 71M6521BE Energy Meter IC Family Software - Manual (Page 136)

71M652X Software User’s Guide
Revision 1.7 TERIDIAN Proprietary 136 of 138
© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
LSB Least Significant Bit
MB Megabyte(s) – 1,024 kilobytes
MPU Microprocessor/microcontroller Unit
MSB Most Siginificant Bit
NV Non-Volatile
PC Personal Computer, Program Counter
PSU Power Supply Unit
PSW Program Status Word
RAM Random Access Memory
SFR Special Function Register (of the 8051 MPU)
TOU Time-of-Use (variable metering tariffs usually based on time of day)
TSC TERIDIAN Semiconductor Corporation
USB Universal Serial Bus
VA Volt-Amperes (apparent power unit)
VAh Volt-Ampere-Hour (apparent energy unit)
VAR Reactive Power
VARh Reactive energy unit
W Watt (power unit)
WD Watchdog
WDT Watchdog timer
WEMU51 The emulator control program by Signum Systems
Wh Watt-Hour (energy unit)
7.2 REVISION HISTORY
Revision Date Description
1.0 Initial release
1.1
1.2
1.3 July 11,
2006
Added description of TCON2 register in MPU section.
1.4 August 11,
2006
Improved formatting and numbering, deleted reference to CE
development tools.
1.5 October 12,
2006
Added explanation on interrupt priorities. Fixed interrupt priorities table.
1.6
May 15,
2007
Deleted list of CLI commands and description of hex records (all this in-
formation is contained in the 6521 DBUM). Added explanation on han-
dling battery modes. Fixed formulae for baud rate generator and diagram
“meter_LCD”. Updated SW revision to 4.3.4 in compatibility statement.
1.7 August 6,
2008
Updated SW revision to 4.7a in compatibility statement. Eliminated refer-
ences to ROM code. Corrected baud rate for CLI. Updated variable and
routine names to match usage in revision 4.7a. Completely revised
chapter 5.6 (Data Flow). Updated Teridian street address.