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參數(shù)資料
| 型號： | TLV5613IPWG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | PARALLEL, WORD INPUT LOADING, 3.5 us SETTLING TIME, 12-BIT DAC, PDSO20 |
| 封裝： | GREEN, PLASTIC, TSSOP-20 |
| 文件頁數(shù)： | 9/23頁 |
| 文件大小： | 447K |
| 代理商： | TLV5613IPWG4 |
TLV5613
2.7 V TO 5.5 V 12-BIT PARALLEL DIGITAL-TO-ANALOG CONVERTER
WITH POWER DOWN
SLAS174B – DECEMBER 1997 – REVISED NOVEMBER 2000
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
;T0_isr: will be called on every timer interrupt.
;fetches a new 16–bit value from program memory space and writes it
;to the DAC. If end of table is reached, sets DPTR to table start addr.
;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
T0_isr:
MOV R0, #003h
;select DAC control register
MOV A, #001h
;RLDAC=0, PWD=0, SPD=1
;no DAC update, normal operation, fast mode
MOVX @R0, A
;write Accu to DAC control register
MOV R0, #001h
;select DAC MSW register
CLR A
MOVC A, @A+DPTR
;get MSW from code memory
MOVX @R0, A
;write Accu to DAC MSW register
INC DPTR
;set DPTR to LSW data
MOV R0, #000h
;select DAC LSW register
CLR A
MOVC A, @A+DPTR
;get LSW from code memory
MOVX @R0, A
;write Accu to DAC LSW register
MOV R0, #003h
;select DAC control register (to update DAC)
MOV A, #005h
;DAC update, normal operation, fast mode
MOVX @R0, A
;write Accu to DAC control register
INC DPTR
;set DPTR to next MSW
;test end of table
MOV A, DPL
CJNE A, #TABLE_END_L, T0_isr_end
MOV A, DPH
CJNE A, #TABLE_END_H, T0_isr_end
MOV DPTR, #TABLE_START
;end of table reached –> start again
T0_isr_end: RETI
END
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