參數(shù)資料
型號: TLV5639I
廠商: Texas Instruments, Inc.
英文描述: 2.7 V TO 5.5 V LOW POWER 12-BIT DIGITAL-TO-ANALOG CONVERTERS WITH INTERNAL REFERENCE AND POWER DOWN
中文描述: 2.7 V至5.5 V低功耗12位數(shù)字到模擬,具有內(nèi)部參考和斷電變換器
文件頁數(shù): 14/17頁
文件大?。?/td> 242K
代理商: TLV5639I
TLV5639C, TLV5639I
2.7 V TO 5.5 V LOW POWER 12-BIT DIGITAL-TO-ANALOG
CONVERTERS WITH INTERNAL REFERENCE AND POWER DOWN
SLAS189 – MARCH 1999
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
; File: RAMP.ASM
; Function: ramp generation with TLV5639
; Processors: TMS320C203
;
1999 Texas Instruments
;–––––––––– I/O and memory mapped regs –––––––––––––––
.include “regs.asm”
dac_data
.equ
0084h
dac_ctrl
.equ
0085h
;––––––––––––– vectors –––––––––––––––––––––––––––––––
.ps
0h
b
start
b
INT1
b
INT23
b
TIM_ISR
––––––––––Main Program––––––––––
.ps
.entry
1000h
start:
ldp
#0
; set data page to 0
; disable interrupts
setc
; disable maskable interrupts
splk
splk
INTM
#0ffffh, IFR
#0004h, IMR
; set up the timer
splk
splk
out
out
splk
out
#0000h, 60h
#0042h, 61h
61h, PRD
60h, TIM
#0c2fh, 62h
62h, TCR
splk
#0011h, 62h ; set up the DAC
; SPD=1 (FAST mode) and ; REF1=1 (2.048 V internal ref enable)
out
62h, dac_ctrl
clrc
INTM
; enable interrupts
; loop forever!
next
b
idle
next
–––––––––– Interrupt Service Routines––––––––––
INT1:
INT23:
TIM_ISR:
; timer interrupt handler
add
sacl
out
clrc
ret
.END
ret
ret
; do nothing and return
; do nothing and return
#1h
60h
60h, dac_data ; write to DAC
intm
; re-enable interrupts
; return from interrupt
; increment accumulator
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