SPRUIZ1B July 2023 – August 2024 TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1
Primary (data) filters can be synchronized with respect to the PWM event (called SDSYNC event). The SDSYNC signal from the PWM module is used to reset the DOSR counter. This feature is by default disabled and can be enabled by setting SDDFPARMx.SDSYNCEN = 1. Each primary filter can be synchronized from any of the available PWMx SOCA/SOCB signals (see Table 24-5). The SDSYNCx.SDSYNCSEL bits allow the user to configure which PWM signal provides the SDSYNC pulse to the primary filter. Figure 24-10 shows how device PWM signals are connected to the SDFM modules.
SDSYNCxSYNCSEL | Input Signal |
---|---|
0 | EPWM1_SOCA |
1 | EPWM1_SOCB |
2 | EPWM17_SOCA |
3 | EPWM17_SOCB |
4 | EPWM2_SOCA |
5 | EPWM2_SOCB |
6 | EPWM18_SOCA |
7 | EPWM18_SOCB |
8 | EPWM3_SOCA |
9 | EPWM3_SOCB |
10-11 | Reserved |
12 | EPWM4_SOCA |
13 | EPWM4_SOCB |
14-15 | Reserved |
16 | EPWM5_SOCA |
17 | EPWM5_SOCB |
18-19 | Reserved |
20 | EPWM6_SOCA |
21 | EPWM6_SOCB |
22-23 | Reserved |
24 | EPWM7_SOCA |
25 | EPWM7_SOCB |
26-27 | Reserved |
28 | EPWM8_SOCA |
29 | EPWM8_SOCB |
30-31 | Reserved |
32 | EPWM9_SOCA |
33 | EPWM9_SOCB |
34-35 | Reserved |
36 | EPWM10_SOCA |
37 | EPWM10_SOCB |
38-39 | Reserved |
40 | EPWM11_SOCA |
41 | EPWM11_SOCB |
42-43 | Reserved |
44 | EPWM12_SOCA |
45 | EPWM12_SOCB |
46-47 | Reserved |
48 | EPWM13_SOCA |
49 | EPWM13_SOCB |
50-51 | Reserved |
52 | EPWM14_SOCA |
53 | EPWM14_SOCB |
54-55 | Reserved |
56 | EPWM15_SOCA |
57 | EPWM15_SOCB |
58-59 | Reserved |
60 | EPWM16_SOCA |
61 | EPWM16_SOCB |
62 | Reserved |
63 | SDFM1.SDSYNC1 - EPWM11_CTR_CMPC SDFM1.SDSYNC2 - EPWM11_CTR_CMPC SDFM1.SDSYNC3 - EPWM11_CTR_CMPD SDFM1.SDSYNC4 - EPWM11_CTR_CMPD SDFM2.SDSYNC1 - EPWM12_CTR_CMPC SDFM2.SDSYNC2 - EPWM12_CTR_CMPC SDFM2.SDSYNC3 - EPWM12_CTR_CMPD SDFM2.SDSYNC4 - EPWM12_CTR_CMPD SDFM3.SDSYNC1 - EPWM13_CTR_CMPC SDFM3.SDSYNC2 - EPWM13_CTR_CMPC SDFM3.SDSYNC3 - EPWM13_CTR_CMPD SDFM3.SDSYNC4 - EPWM13_CTR_CMPD SDFM4.SDSYNC1 - EPWM14_CTR_CMPC SDFM4.SDSYNC2 - EPWM14_CTR_CMPC SDFM4.SDSYNC3 - EPWM14_CTR_CMPD SDFM4.SDSYNC4 - EPWM14_CTR_CMPD |
Because of the inherent architecture of the Sinc filter (Sinc1, Sinc2, Sinc3, SincFast), the first few samples, depending upon filter type, are incorrect. Table 24-6 shows the number of incorrect samples on the following conditions:
Filter Type | Number of Incorrect Samples After the Filter is Enabled and Configured |
---|---|
Sinc1 | No incorrect sample. |
Sinc2 | The first sample of the Sinc2 filter is incorrect. |
SincFast | The first two samples of the SincFast filter are incorrect. |
Sinc3 | The first two samples of the Sinc3 filter are incorrect. |