DAC888_15 Datasheet, PDF (12/12 Pages) Analog Devices – 8-BIt LevelTriggered Latch

IPM!)
DAC-888 BYTEDAC'" 8-BIT HIGH-SPEED "MICROPROCESSOR COMPATIBLE'" MUl TIPl YING D/A CONVERTER
SUCCESSIVE APPROXIMATION ANALOG- TO-DIGITAL CONVERSION PROGRAM
LISTING USING DAC-888 AND SYM 1 PCB WITH 6502/-lP WITH FLOW CHART
LOCATION
DATA
MNEMONIC
COMMENTS
500
A9oo
LOA #00
Clear
502
A208
LOX #08
Set Index Register
504
9500
STA,X
Clear Memory at 08H
506
A980
LOA #80
Trial Bit
506
A8
TAY
TOY
509
800010
STA 1000 (Cont.) Output
50C
AD 00 1C LOA 1COO
Read Compo
50F
2901
AND A, #01
Mask it
OBSOLETE ⁵¹¹
FO01
513
98
514
18
515
7500
517
9500
519
98
51A
4A
51B
A8
51C
1500
51E
90 E9
520
4C 00 05
NOTE: 32 Bytes 260/,s
BEO"+1
TYA
CLC
ADC.X
STA.X
TYA
LSR
TAY
ORA.X
BCC "-23
JMP 500
Branch if CMP = 0
Get Trial Bit
Clear Carry
Result Summed With
Previous Test
Save it
Get Trial Value
Next Bit
Save it
Next Data
Continue For 8 Trials
Do Over
BURN-IN CIRCUIT
+5V
-=-
1B
4
OAC-BBB
13
12
-¹¹
10
-12V
0.1~F.50V
-=
10kD
11-112
- - - --
7/89, Rev. B