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參數(shù)資料
| 型號： | AD8600CHIPS |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | 16-Channel, 8-Bit Multiplying DAC |
| 中文描述： | PARALLEL, 8 BITS INPUT LOADING, 2 us SETTLING TIME, 8-BIT DAC, UUC43 |
| 封裝： | DIE |
| 文件頁數(shù)： | 12/16頁 |
| 文件大小： | 236K |
| 代理商： | AD8600CHIPS |
REV. 0
–12–
AD8600
* This program contains subroutines to read and write
* to the AD8600 from the 68HC11. Additionally, a ramp
* program has been included, to continuously ramp the
* output giving a triangle wave output.
*
* The following connections need to be made:
* 68HC11 AD8600
* GND DGND1,2
* PC0-PC7 DB0–DB7 respectively, data port
* PB0-PB3 A0–A3 respectively, address port
* PB4 LD
* PB5 EN
* PB6 R/W
* PB7 CS
*
portc equ $1003 define port addresses
portb equ $1004
ddrc equ $1007
*
org $C000
read lds #$CFFF subroutine to read from AD8600
*
ldaa #$00 initialize port c to 00000000
staa ddrc configures PC0-PC7 as inputs.
*
ldx #$00 points to DAC address in 68HC11 memory
ldaa 0,x put the address in the accumulator
adda #$70 add the control bits to the address
* R/W, LD, EN are high, CS is low.
staa portb output control and address on port b.
*
inx points to memory location to store the data
ldaa portc read data from DAC
staa 0,x Store this data in memory at address “x”
*
ldy #$1000
bset portb,y $f0 Set CS, LD, EN high
jmp $e000 Return to BUFFALO
*
*
write lds #$cfff routine to write to AD8600
ldaa #$ff initialize port c to 11111111
staa ddrc configures PC0-PC7 as outputs.
*
ldx #$00 points to DAC address in 68HC11 mem
ldaa 0,x puts the address in the accumulator
adda #$30 set CS, R/W low and LD, EN high
staa portb output to portb for control and address
*
inx points to memory location to store the data
ldaa 0,x load the data into the accumulator
staa portc write the data to the DAC
*
ldy #$1000
bclr portb,y $30 Set LD, EN low to latch data
bset portb,y $b0 Bring LD, EN, CS high, write is complete
*
jmp $e000 Return to BUFFALO
*
*
ramp lds #$cfff routine to generate a triangle wave
ldaa #$ff configure port c as outputs
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