Renesas RX100 Series User Manual page 870

RX13T Group
Operation example 5 shows group priority operation in group scan mode (ADGSPCR.GBRSCN = 1, ADGSPCR.GBRP
= 1, ADGSPCR.LGRRS = 1) when channel 0 is selected for group A, channel 1 is selected for group B, and channels 2
and 3 are selected for group C.
When the ADGCTRGR.GRCE bit is set to 1, single scan mode is continuously operated on group B and trigger input for
group C is disabled.
Operation example 5: Continuous single scan operation on group C
(1) When setting ADGSPCR.GBRP to 1 sets the ADCSR.ADST bit to 1 (A/D conversion start), scan for the ANn
channels selected in the ADANSC0 register, starts from the channel with the smallest number n.
(2) On completion of A/D conversion on a single channel, the result is stored in the corresponding A/D data register
(ADDRy)
(3) If a group B trigger is input during scan for group C, group C scan is discontinued while the ADCSR.ADST bit
remains 1, and scan for the ANn channels of group B selected in the ADANSB0 register, starts from the channel
with the smallest number n. If A/D conversion is not completed when scan was discontinued, the result is not stored
in the corresponding A/D data register (ADDRy).
(4) If a group A trigger is input during scan for group B, group B scan is discontinued while the ADCSR.ADST bit
remains 1, and scan for the ANn channels of group A selected in the ADANSA0 register, starts from the channel
with the smallest number n. If A/D conversion is not completed when scan was discontinued, the result is not stored
in the corresponding A/D data register (ADDRy).
(5) On completion of A/D conversion on a single channel, the result is stored in the corresponding A/D data register
(ADDRy)
(6) A scan end interrupt request is generated if the ADCSR.ADIE bit is 1 (interrupt generation upon scanning
completion enabled).
(7) If the ADGSPCR.GBRSCN bit is 1 (scan for the group is restarted after having been discontinued due to group
priority operation), scan for the ANn channels of group B selected in the ADANSB0 register, restarts from the
channel with the smallest number n while the ADCSR.ADST bit remains 1. If the ADGSPCR.LGRRS bit is set to 1
at this time, scan for group B starts from the channel on which A/D conversion was discontinued.
(8) On completion of A/D conversion on a single channel, the result is stored in the corresponding A/D data register
(ADDRy)
(9) A group B scan end interrupt request is generated if the ADCSR.GBADIE bit is 1 (interrupt generation upon group
B scan completion enabled).
(10) If the ADGSPCR.GBRSCN bit is 1 (scan for the group is restarted after having been discontinued due to group
priority operation), scan for the ANn channels of group C selected in the ADANSC0 register, restarts from the
channel with the smallest number n while the ADCSR.ADST bit remains 1. If the ADGSPCR.LGRRS bit is set to 1
at this time, scan for group C starts from the channel on which A/D conversion was discontinued.
(11) On completion of A/D conversion on a single channel, the result is stored in the corresponding A/D data register
(ADDRy)
(12) A group C scan end interrupt request is generated if the ADCSR.GBADIE bit is 1 (interrupt generation upon group
C scan completion enabled).
(13) If the ADGSPCR.GBRP bit is set to 1 (single scan is continuously operated), scan for the ANn channels of group C
selected in the ADANSC0 register, restarts from the channel with the smallest number n while the ADCSR.ADST
bit remains 1.
To continuously operate single scan for group C, disable trigger input for group B.
Steps 13, 11, 12, and then 13 are repeated as long as the ADGSPCR.GBRP bit remains 1.
Clearing of the ADCSR.ADST bit to 0 is prohibited while the ADGSPCR.GBRP bit is set to 1.
To forcibly stop scanning when ADGSPCR.GBRP = 1, follow the procedures for clear operation by software through the
ADCSR.ADST bit shown in section 26.6.2, Notes on Stopping A/D Conversion .
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
26. 12-Bit A/D Converter (S12ADF)
Page 870 of 1041