Maxim Integrated 71M6521BE Energy Meter IC Family Software - Manual (Page 57)

71M652X Software User’s Guide
Revision 1.7 TERIDIAN Proprietary 57 of 138
© Copyright 2005-2007 TERIDIAN Semiconductor Corporation
meter_LCD
meter_lcd()
ce_active = FALSE &
RTC_Tic() =TRUE?
no
yes
LCD Clear
Display " CE OFF"
my_beat = beat
beat != my_beat?
END
ce_totals_rdy() = TRUE
ce_totals_ready=FALSE
Save accumulated energy to
BROWNOUT cache
select_scroll = 0
select_total >=
MAX_TOTAL?
Clear display
M_DATE !=
select_scroll?
LCD_mode (select_scroll)
meter_totals (select_scroll,0)
yes
no
no
meter_totals (select_total,
select_phase)
BROWNOUT mode?
yes, display
other than date
no
MAX_SCROLL ==
select_scroll?
increment select_scroll
yes
no
beat?
decimal point on
yes
yes
decimal point off
no
decimal point on
yes
no
date
display
display selected
quantity on LCD
reset selector after it
reached maximum
no
arrange for blinking
of decimal point
yes
Figure 5-12: meter_LCD