Texas Instruments TLV1562 - Manual (Page 57)

Software Overview
51 Interfacing the TLV1562 Parallel ADC to the TMS320C54x DSP
.elseif NO_INT0_SIG
* instead of using the INT signal, the processor waits
* for 6ADCSYSCLK+49ns and reads then the sample
repeat(#32)
nop ; wait for 34 processor cycles
.endif
* read sample
STEP7: @ADSAMPLE = port(ADC) ; read the new sample into the DSP
XF = 1 ; set RD
.if (SEND_OUT_PARALLEL)
* store sample into the parallel buffer location if choosen
port(DAC1) = @ADSAMPLE ; update DAC output
@TEMP = port(ADC) ; activate ADC CS again
.endif
.if (AUTO_PWDN)
* deselect/select the ADC with CS (requirment in Auto power down mode)
@TEMP = port(DEACTIVE) ; deselect ADC
@TEMP = port(ADC) ; activate ADC CS again
repeat(#18)
nop ; wait for 20 clock cycles [t(APDR)=500ns]
.endif
XF = 0 ; clear RD (step 4)
call STORE ; handle storing of the samples into memory and serail DAC
.if INT0_DRIVEN
return ; return from routine back to IRQ_INT0
.else
goto STEP5 ; go back to receive next sample
.endif
**********************************
* STORE:
* saving the samples into memory
**********************************
STORE:
.if SAVE_INTO_MEMORY
* store new sample into DSP data memory
*AR7+ = data(@ADSAMPLE) ; write last sample into memory table
.endif
.if SEND_OUT_SERIAL
* store sample into the serial buffer location