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參數(shù)資料
| 型號： | TLV5614(中文) |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 2.7V to 5.5V 12-Bit 3us Quadruple Digital-to-Analog Converters With Power Down(具有掉電功能的2.7V至5.5V,12位,3微秒,四路DAC) |
| 中文描述： | 2.7V至5.5V 12位3us四倍數(shù)字模擬轉(zhuǎn)換器由于斷電（具有掉電功能的為2.7V至5.5V之間，12位，3微秒，四路援會） |
| 文件頁數(shù)： | 19/20頁 |
| 文件大?。?/td> | 529K |
| 代理商： | TLV5614(中文) |
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MOV
A,R7
ADD
A,#0FH
ANL
MOV
R7,A
MOVC
A,@A+DPTR
ORL
A,#03H
; pointer in R7
; add 15 already done one INC
; wrap back round to 0 if > 64
; pointer back in R7
; get DAC D msb from the table
; set control bits to DAC D address
A,#03FH
B_LSB_TX:
JNB
SETB
CLR
CLR
MOV
TI,B_LSB_TX
T1
T1
TI ; clear for new transmit
SBUF,A
; wait for DAC B lsb transmit to complete
; toggle FS
; and send out the msb of DAC D
INC
MOV
MOVC
R7
A,R7
A,@A+DPTR
; increment the pointer in R7
; to get the next byte from the table
; which is the lsb of this sample, now in ACC
D_MSB_TX:
JNB
CLR
MOV
TI,D_MSB_TX
TI
SBUF,A
; wait for transmit to complete
; clear for new transmit
; and send out the lsb of DAC D
; increment the rolling pointer to point to the next sample
; ready for the next interrupt
MOV
A,rolling_ptr
ADD
A,#02H
; add 2 to the rolling pointer
ANL
A,#03FH
; wrap back round to 0 if > 64
MOV
rolling_ptr,A; store in memory again
D_LSB_TX:
JNB
TI,D_LSB_TX
; wait for DAC D lsb transmit to complete
CLR
TI
; clear for next transmit
SETB
T1
; FS high
SETB
T0
; CS high
POP
ACC
POP
PSW
RETI
;
; Stack needs definition
;
RSEG STACK
DS 10h
; 16 Byte Stack!
;
; Main program code
;
RSEG
MAIN
start:
MOV
SP,#STACK 1
; first set Stack Pointer
CLRA
MOV
SCON,A
; set serial port 0 to mode 0
MOV
TMOD,#02H
; set timer 0 to mode 2 auto reload
MOV
TH0,#038H
; set TH0 for 5kHs interrupts
SETB
INT1
; set LDAC = 1
SETB
T1
; set FS = 1
SETB
T0
; set CS = 1
SETB
ET0
; enable timer 0 interrupts
SETB
EA
; enable all interrupts
MOV
rolling_ptr,A; set rolling pointer to 0
SETB
TR0
; start timer 0
always:
SJMP
always
; while(1) !
RET
;
; Table of 32 sine wave samples used as DAC data
;
RSEG
SINTBL
----------------------------------------------------------------------------------------------------------------------------------------------------------------
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