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AN1320 Datasheet(PDF) 16 Page - STMicroelectronics

Part # AN1320
Description  IN BALLAST APPLICATIONS
PDF  20 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN1320 Datasheet(HTML) 16 Page - STMicroelectronics

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AN1320 APPLICATION NOTE
16/20
IgnStart
; *** Ignition sequence
clr
Step
; Reset lookup table index
Ignition
ldi
A,40H
; Load Duty-Cycle value from look-up table
add
A,Step
ld
X,A
ld
A,(X)
ld
ARCP,A
; on comparator value
ldi
a,TignTick
; Load tick counter
ld
x,a
ldi
a,TignRepeat
; Load repetition time
ld
y,a
call
Wait
inc
Step
; Update step counter
ld
A,Step
cpi
A,40h
; if last value in table
jrz
Ignited
; exit
nop
; else next value
nop
jp
Ignition
Ignited
inc
NrTent
ldi
a,GenTick
; Load tick counter
ld
x,a
ldi
a,GenRepeat
; Load repetition time
ld
y,a
call
Wait
jrr
2,DRC,LampOn
; if lamp ignited (PC2=0) go ahead
ld
A,NrTent
cpi
A,MAX_TENT
; if trial number overflows, stop
jrz
GotoStop
jp
PreHeat
; else retry
GotoStop
jp
StopIt
LampOn
; *** System working, set interrupt on PortC, pin 2 and 3
clr
IOR
clr
DDRC
ldi
OPRC,08H
; PC3 (No Lamp) INT pull-up
clr
DRC
ldi
IOR,30h
; enable global int, rising edge
; *** Internal timer activation for A/D tracking
res
3,TSCR
; Stop Timer 1
set
6,TSCR
; Enable interrupt
ldi
a,TadTick
; Load tick counter
ld
TCR,a
ldi
a,TadRepeat
; Load repetition time
ld
Repeat,a
set
3,TSCR
; Start Timer
; New Data Rom Window Configuration
ldi
DRWR,3CH
; = (0F00H >> 6)



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