Specifications

4.7 Digital Compare Submodule Registers
4.8 Event-Trigger Submodule Registers
www.ti.com Digital Compare Submodule Registers
Figure 4-24 through Figure 4-28 and Table 4-24 through Table 4-28 describe the registers for the
event-trigger submodule.
Figure 4-24. Event-Trigger Selection Register (ETSEL)
15 14 12 11 10 8
SOCBEN SOCBSEL SOCAEN SOCASEL
R/W-0 R/W-0 R/W-0 R/W-0
7 4 3 2 0
Reserved INTEN INTSEL
R-0 R/W-0 R/W-0
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 4-24. Event-Trigger Selection Register (ETSEL) Field Descriptions
Bits Name Value Description
15 SOCBEN Enable the ADC Start of Conversion B (EPWMxSOCB) Pulse
0 Disable EPWMxSOCB.
1 Enable EPWMxSOCB pulse.
14-12 SOCBSEL EPWMxSOCB Selection Options
These bits determine when a EPWMxSOCB pulse will be generated.
000 Reserved
001 Enable event time-base counter equal to zero. (TBCTR = 0x0000)
010 Enable event time-base counter equal to period (TBCTR = TBPRD)
011 Reserved
100 Enable event time-base counter equal to CMPA when the timer is incrementing.
101 Enable event time-base counter equal to CMPA when the timer is decrementing.
110 Enable event: time-base counter equal to CMPB when the timer is incrementing.
111 Enable event: time-base counter equal to CMPB when the timer is decrementing.
11 SOCAEN Enable the ADC Start of Conversion A (EPWMxSOCA) Pulse
0 Disable EPWMxSOCA.
1 Enable EPWMxSOCA pulse.
10-8 SOCASEL EPWMxSOCA Selection Options
These bits determine when a EPWMxSOCA pulse will be generated.
000 Reserved
001 Enable event time-base counter equal to zero. (TBCTR = 0x0000)
010 Enable event time-base counter equal to period (TBCTR = TBPRD)
011 Reserved
100 Enable event time-base counter equal to CMPA when the timer is incrementing.
101 Enable event time-base counter equal to CMPA when the timer is decrementing.
110 Enable event: time-base counter equal to CMPB when the timer is incrementing.
111 Enable event: time-base counter equal to CMPB when the timer is decrementing.
7-4 Reserved Reserved
SPRU791F – November 2004 – Revised July 2009 Registers 115
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