Texas Instruments TLV1562 - Manual (Page 56)

Software Overview
50 SLAA040
.if (AUTO_PWDN_ENABLE)
@CR1_SEND ^= #NO_AUTO_PWDN ; clear NO_AUTO_PWDN bit if one
@CR1_SEND |= #AUTO_PWDN ; set AUTO_PWDN mode
.endif
.if (DIFF_INPUT_MODE)
@CR0_SEND ^= #SINGLE_END ; clear single ended input bit if one
@CR0_SEND |= #DIFFERENTIAL ; set differential input mode
.endif
****************************
* ADC_INI:
* set ADC register CR0/CR1
****************************
ADC_INI:
* write CR1:
port(ADC) = @CR1_SEND ; Address decoder sets CS low,
; WR low and send CR1 value to the ADC
port(DEACTIVE) = @ZERO ; deselect ADC (CShigh)
NOP ; wait for tW(CSH)=50ns
* write CR0
port(ADC) = @CR0_SEND ; send CR0 value to the ADC
port(DEACTIVE) = @ZERO ; deselect ADC (CShigh)
NOP ; 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:
M1: TC = bit(*AR5,15–0) ; 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 ;