Texas Instruments TLV1562 - Manual (Page 76)

Software Overview
70 SLAA040
.if (EXTERNAL_CLOCK)
@CR0_SEND ^= #CLK_INTERNAL ; clear CLK_INTERNAL bit if one
@CR0_SEND |= #CLK_EXTERNAL ; set CLK_EXTERNAL mode
.endif
.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
****************************************************************************
* Calibration:
* do a calibration of the input if choosen (the location of this instruction
* is only for an EVM test, in practice, the calibration procedure should
* be executed when the inputs are shorted to the correct voltage and after
* calibration, the analog signal is to apply before doing any further signal
* conversion)
* the calibration implementation is more or less inserted as an example
****************************************************************************
.if (IME_CALIBRATION)
call CALIBRAT_INTERNAL_MID_SCALE
.endif
.if (SME_CALIBRATION)
call CALIBRAT_SYSTEM_MID_SCALE
.endif
****************************
* ADC_INI:
* set ADC register CR0/CR1
****************************
ADC_INI:
* write CR1 (to reset old CSTART mode initialization, because otherwise, the ADC never sets
* back its INT pin to show a sample is available:
@CR_PROBLEM = #(SW_PWDN|NO_AUTO_PWDN|NO_2COMPLEMENT|NO_DEBUG|RES_10_BIT|RD_CONV_START);
port(ADC) = @CR_PROBLEM ; Address decoder sets CS low,
; WR– low and send CR_PROBLEM value to the ADC
NOP ; wait for tW(CSH)=50ns
* write CR1:
port(ADC) = @CR1_SEND ; Address decoder sets CS low,
; WR– low and send CR1 value to the ADC