Texas Instruments TLV1562 manual Software Overview, SLAA040

Software Overview

* use calibrated mode in the following for conversion

@CR0_SEND = #CALIB_OP	; set calibration for further use
* clear mode related bits in CR_CALIBRA and set MONO_INT:
@CR_CALIBRA &= #(MONO_INT^0FFFFh)	; clear bit for no calibration use
@CR_CALIBRA &= #(DUAL_INT^0FFFFh)	; clear bit for no calibration use

@CR_CALIBRA &= #(MONO_CONTINUOUS^0FFFFh); clear bit for no calibration use @CR_CALIBRA &= #(DUAL_CONTINUOUS^0FFFFh); clear bit for no calibration use

@CR_CALIBRA = #MONO_INT	; set calibration for further use
* clear clock related bits in CR_CALIBRA and set internal clock mode:
@CR_CALIBRA &= #(CLK_INTERNAL^0FFFFh)	; clear bit for no calibration use
@CR_CALIBRA &= #(CLK_EXTERNAL^0FFFFh)	; clear bit for no calibration use
@CR_CALIBRA = #CLK_INTERNAL	; set calibration for further use
* set mode for intermal offset calibration:
@CR_CALIBRA = #SYS_OFF_CALIB	; set internal calibration mode

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*verify ADC register CR0/CR1

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*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_PWDNNO_AUTO_PWDNNO_2COMPLEMENTNO_DEBUGRES_10_BITRD_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

*initialize the send values to setup the two programmable registers of the ADC

@CR_PROBLEM = #(NO_SW_PWDNNO_AUTO_PWDNNO_2COMPLEMENTNO_DEBUGRES_10_BITCST_CONV_START);

port(ADC) = @CR_PROBLEM	; send CR0 value to the ADC
port(DEACTIVE) = @ZERO	; deselect ADC (CS high)
NOP	; wait for tW(CSH)=50ns
* write CR0
port(ADC) = @CR_CALIBRA	; send CR0 value to the ADC
port(DEACTIVE) = @ZERO	; deselect ADC (CS high)
NOP	; wait for tW(CSH)=50ns

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

*do one sample to perform the calibration

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

XF	= 0	; clear CSTART
repeat(#10)

56SLAA040