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TLV5604CPWR Datasheet(PDF) 17 Page - Texas Instruments |
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TLV5604CPWR Datasheet(HTML) 17 Page - Texas Instruments |
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17 / 27 page  TLV5604 2.7-V TO 5.5-V 10-BIT 3- µS QUADRUPLE DIGITAL-TO-ANALOG CONVERTERS WITH POWER DOWN SLAS176A – DECEMBER 1997 – REVISED SEPTEMBER 1998 17 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ; set up the timer ; timer period set by values in PRD and TDDR ; period = (CLKOUT1 period) × (1+PRD) × (1+TDDR) ; examples for TMS320C203 with 40 MHz main clock ; Timer rate TDDR PRD ; 80 kHz 9 24 (18h) ; 50 kHz 9 39 (27h) ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– prd_val.equ 0018h tcr_val.equ 0029h splk #0000h, temp ; clear timer out temp, TIM splk #prd_val, temp ; set PRD out temp, PRD splk #tcr_val, temp ; set TDDR, and TRB=1 for auto-reload out temp, TCR ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ; Configure IO0/1 as outputs to be : ; IO0 CS – and set high ; IO1 LDAC – and set high ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– in temp, ASPCR ; configure as output lacl temp or #0003h sacl temp out temp, ASPCR in temp, IOSR ; set them high lacl temp or #0003h sacl temp out temp, IOSR ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ; set up serial port for ; SSPCR.TXM=1 Transmit mode – generate FSX ; SSPCR.MCM=1 Clock mode – internal clock source ; SSPCR.FSM=1 Burst mode ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– splk #0000Eh, temp out temp, SSPCR ; reset transmitter splk #0002Eh, temp out temp, SSPCR ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ; reset the rolling pointer ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– lacl #000h sacl r_ptr ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ; enable interrupts ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– clrc INTM ; enable maskable interrupts ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ; loop forever! ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– next idle ;wait for interrupt b next ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– ; all else fails stop here ;––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– done b done ;hang there |
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