Datasheet

TLV5614
2.7-V TO 5.5-V 12-BIT 3-µS QUADRUPLE DIGITAL-TO-ANALOG CONVERTERS
WITH POWER DOWN
SLAS188B – SEPTEMBER 1998 – REVISED APRIL 2003
18
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
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; Main Program
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.ps 1000h
.entry
start
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; disable interrupts
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setc INTM ; disable maskable interrupts
splk #0ffffh, IFR; clear all interrupts
splk #0004h, IMR; timer interrupts unmasked
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; set up the timer
; timer period set by values in PRD and TDDR
; period = (CLKOUT1 period) x (1+PRD) x (1+TDDR)
; examples for TMS320C203 with 40MHz main clock
; Timer rate TDDR PRD
; 80 kHz 9 24 (18h)
; 50 kHz 9 39 (27h)
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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
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; Configure IO0/1 as outputs to be :
; IO0 CS – and set high
; IO1 LDAC – and set high
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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
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; 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
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splk #0000Eh, temp
out temp, SSPCR; reset transmitter
splk #0002Eh, temp
out temp,SSPCR
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; reset the rolling pointer
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lacl #000h
sacl r_ptr
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; enable interrupts
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clrc INTM ; enable maskable interrupts
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; loop forever!
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