ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 463 -
Revision 2.4
SAR ADC Control Register(SARADC_CTL)
Register
Offset
R/W
Description
Reset Value
SARADC_CTL
SA0x60 R/W
SAR ADC Control Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
SWTRG
Reserved
PDMAEN
HWTRGEN
7
6
5
4
3
2
1
0
HWTRGCOND
HWTRGSEL
OPMODE
ADCIE
ADCEN
Bits
Description
[31]
Reserved
Reserved
[30:12]
Reserved
Reserved
[11]
SWTRG
A/D Conversion Start
0 = Conversion stops and A/D converter enter idle state.
1 = Conversion starts.
SWTRG bit can be set to 1 from three sources: software, external pin STADC. SWTRG
will be cleared to 0 by hardware automatically at the ends of single mode and single-cycle
scan mode. In continuous scan mode, A/D conversion is continuously performed until
software writes 0 to this bit or chip reset.
[10]
Reserved
Reserved
[9]
PDMAEN
PDMA Transfer Enable Bit
0 = PDMA data transfer Disabled.
1 = PDMA data transfer in DAT 0~11 Enabled.
When A/D conversion is completed, the converted data is loaded into DAT 0~11, software
can enable this bit to generate a PDMA data transfer request.
When PDMA=1, software must set ADCIE=0 to disable interrupt.
[8]
HWTRGEN
Hardware Trigger Enable Bit
Enable or disable triggering of A/D conversion by hardware (external STADC pin or PWM
Center-aligned trigger).
0 = Disabled.
1 = Enabled.
SARADC hardware trigger function is only supported in single-cycle scan mode.
If hardware trigger mode, the SWTRG bit can be set to 1 by the selected hardware trigger
source.