Texas Instruments TLV1562 Software Overview, if AUTOPWDNENABLE, endif if DIFFINPUTMODE, SLAA040

Software Overview

.if (AUTO_PWDN_ENABLE)

@CR1_SEND ^= #NO_AUTO_PWDN @CR1_SEND = #AUTO_PWDN

.endif

.if (DIFF_INPUT_MODE)

@CR0_SEND ^= #SINGLE_END @CR0_SEND = #DIFFERENTIAL

.endif

****************************

*ADC_INI:

*set ADC register CR0/CR1

****************************

ADC_INI:

* write CR1:

port(ADC) = @CR1_SEND

port(DEACTIVE) = @ZERO

NOP

* write CR0

port(ADC) = @CR0_SEND port(DEACTIVE) = @ZERO

NOP

;clear NO_AUTO_PWDN bit if one

;set AUTO_PWDN mode

;clear single ended input bit if one

;set differential input mode

;Address decoder sets CS low,

;WR low and send CR1 value to the ADC

;deselect ADC (CShigh)

;wait for tW(CSH)=50ns

;send CR0 value to the ADC

;deselect ADC (CShigh)

;wait for tW(CSH)=50ns

*******************************************

*ADC_mono_IRQ_Start:

*read samples and store them into memory

*******************************************

ADC_mono_IRQ_Start:

STEP2: @TEMP	= port(ADC)	; select ADC (CS low) (change address bus signal)
STEP3: repeat(#4)
NOP		; wait for tD(CSL–SAMPLE)+1SYSCLK=6
STEP4: XF	= 0	; clear RD
STEP5:
.if POLLING_DRV
* wait until INT– goes low in polling the INT0 pin:
	= bit(*AR5,15–0)
M1: TC		; test, is the INT0 Bit in IFR=1?
if (NTC) goto M1		; wait until INT signal goes high
IFR	= #1	; reset any old interrupt on pin INT0

.elseif INT0_DRIVEN

*user main program area (this could execute additional code)

*go into idle state until the INT0 wakes the processor up

USER_MAIN: IDLE(2)	; the user software could do something else here
goto USER_MAIN	;

50SLAA040