TMS320F280039C: What's does PWMA_OE mean for CLB?

Wayne Huang

Genius 17205 points

Part Number: TMS320F280039C

Dear Champs,

I am asking this for our customer.

In the TRM (SPRUIW9A)

https://www.ti.com/lit/ug/spruiw9a/spruiw9a.pdf?ts=1655699580633

In Table 32-3. Peripheral Signal Multiplexer Table of CLB chapter,

1. In the table, it means the output0 of CLB1 can be override EPWM1A signal if the OUPTUT ENABLE bit for OUT0 is set to 1. Right?

2. What does PWMA_OE mean?

What does "OE" stand for?

3. What is the difference between PWMA and PWMA_OE?

Wayne Huang

over 4 years ago

+1 Peter Luong over 4 years ago

TI__Mastermind 24541 points

Hi Wayne,

The purpose of the PWMA_OE signal is discussed in this other E2E thread: https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/1089158/tms320f280039c-how-to-use-pwma-oe-and-pwmb-oe-in-clb

To summarize:

1. This is correct, output0 of CLB1 overrides the EPWM1A signal.

2. The OE in PWMA_OE stands for OUTPUT ENABLE.

3. The PWMA signal corresponds directly to the EPWM1A output signal, meaning when the output0 enable bit is set, EPWM1A's signal will be overriden by the CLB output. PWMA_OE is used to tristate the EPWM1A output, sort of like a trip condition. Meaning when output1 enable bit is set, EPWM1A output is tristated when CLB output is high.

Regards,

Peter

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280039C: What's does PWMA_OE mean for CLB?