ISD94100 Series Technical Reference Manual
Sep 9, 2019
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register is a shadow register of highest priority EADC_DAT register. The lower number sample
module is higher priority. After PDMA read EADC_CURDAT register, the VAILD of the shadow
EADC_DAT register will be automatically cleared.
6.16.5.14 Interrupt Sources
The ADC converter generates ADIFn (EADC_STATUS2[3:0], n=0~3) at the start of conversion or
the end of conversion decide by INTPOS (EADC_SCTLn[22], n=0~12). If ADCIENn
(EADC_CTL[5:2], n=0~3) is set then conversion end interrupt request ADINTn (n=0~3) is
generated. The controller of interrupts is shown as Figure 6.16-14
ADIF0 (EADC_STATUS2[0])
ADCIEN0 (EADC_CTL[2])
ADINT0
ADIF1 (EADC_STATUS2[1])
ADCIEN1 (EADC_CTL[3])
ADINT1
ADIF2 (EADC_STATUS2[2])
ADCIEN2 (EADC_CTL[4])
ADINT2
ADIF3 (EADC_STATUS2[3])
ADCIEN3 (EADC_CTL[5])
ADINT3
ADCMPF0 (EADC_STATUS2[4])
ADCMPIE0 (EADC_CMP0[1])
ADCMPF1 (EADC_STATUS2[5])
ADCMPIE1 (EADC_CMP1[1])
ADCMPF2 (EADC_STATUS2[6])
ADCMPIE2 (EADC_CMP2[1])
ADCMPF3 (EADC_STATUS2[7])
ADCMPIE3 (EADC_CMP3[1])
Figure 6.16-14 ADC Controller Interrupts
6.16.5.15 ADC
Power Management and Calibration
There are three kind of power saving modes, including ADC Deep Power-down, ADC Power-down
mode and ADC Standby mode. User can configure PWDMOD (EADC_PWRM[3:2]) to select which
power saving mode EADC would enter when ADCEN (EADC_CTL[0]) is set as 0.
The difference of these power down mode is shown as Table 6.16.5-2. Because the internal LDO
will be shut down in Deep Power-down and Power-down mode, EADC needs to take extra time to
resume. The interval of time to resume is set by LDOSUT (EADC_PWRM[19:8]) which must be
longer than 20 us. As for the Standby mode, LDO will keep enable and start-up time is unnecessary.
Power Supplies
Deep Power-Down
Power-Down
Standby
Internal LDO
Disable
Disable
Enable
Internal power switch
Disable
Enable
Enable