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TMS320F28335: tms320f28335

Part Number: TMS320F28335
Other Parts Discussed in Thread: C2000WARE

TI E2E F28335.pdf

The schematic is as shown. when I am soldering the LS07 (HEX BUFFER) IC  the PWM signal at gpio1-6 is becoming 0. when I am removing the buffer the signals are coming fine 0-3.3 V pulses.  Also, I checked the buffer circuit only by lifting the input pin and giving PWM in from the experimenter kit, the output is coming fine. Can u suggest what could be the problem?

without buffer ic pwm 1(gpio 00)