Datasheet

TMS570LS20216, TMS570LS20206, TMS570LS10216
TMS570LS10206, TMS570LS10116, TMS570LS10106
www.ti.com SPNS141F–AUGUST 2010– REVISED JULY 2011
4.5 MIBADC Event Trigger Sources
All three conversion groups can be configured for event-triggered operation, providing up to three event
triggered groups.
The trigger source and polarity can be selected individually for group 1, group 2 and the event group from
the options identified in the first table following for MibADC1 and in the second table following for
MibADC2.
Table 4-6. MIBADC1 Event Trigger Sources
Event # SOURCE SELECT BITS for G1, G2 or Hookup
EVENT (G1SRC[2:0], G2SRC[2:0] or
EVSRC[2:0])
1 000 AD1EVT
2 001 NHET[8]
3 010 NHET[10]
4 011 RTI compare 0
5 100 NHET[17]
6 101 NHET[19]
7 110 GIOB[0]
8 111 GIOB[1]
NOTE
The Trigger is present, even if the pin is not available.
Table 4-7. MIBADC2 Event Trigger Sources
Event # SOURCE SELECT BITS for G1, G2 or Hookup
EVENT (G1SRC[2:0], G2SRC[2:0] or
EVSRC[2:0])
1 000 AD2EVT
2 001 NHET[8]
3 010 NHET[10]
4 011 RTI compare 0
5 100 NHET[17]
6 101 NHET[19]
7 110 GIOB[0]
8 111 GIOB[1]
NOTE
The Trigger is present, even if the pin is not available.
The application can generate the trigger condition using these signals by configuring the corresponding
device pins as input pins and driving them from an external source, or by configuring them as output pins
and driving them by software. The pin doesn't have to be present on the package to be able to be used as
a trigger.
The interrupt request signals (RTI compare 0) are driven HIGH when the interrupt condition occurs. So if
the ADC is required to be triggered on the interrupt being asserted, select the rising edge for this trigger
source. The ADC can be still triggered using the falling edge on the interrupt line. In this case, the falling
edge occurs when the interrupt line is deasserted.
Copyright © 2010–2011, Texas Instruments Incorporated Peripherals 47
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