[George]

I have a MPS056A320 (SFW198E010) and compiling my program i get:

Used code size:       9180h (   36 KByte)
Free code space:      16E70h (   91 KByte)
Total code space:      1FFF0h (  127 KByte)

Used data space:       1E88h (    7 KByte)
Free data space:        178h (    0 KByte)
Total data space:       2000h (    8 KByte)

Used retain data space:        214h (     0 KByte)
Free retain data space:        1D4h (     0 KByte)
Total retain data space:    3E8h (     0 KByte)

In the characteristics of the CPU i see the data memory size is 20Kb RAM which is different from 8KBytes that i get. I have already executed the command “Force target image upload”.

 

[George]

Thank you for your answer.

My problem is not to characterize the device and to find the correction offset (I already found it), but that of the settling time needed (from asymmetric Ton/Toff to symmetric, about 25 .. 30 minutes) from the machine startup every morning to operate. Is there a workaround on this issue?

How affects the load current of the PWM output the operating conditions?

Maybe light load current better for rise time, but not good for temperature drift?

[George]

I want to use the PWM output on a MPS054, but i measured an asymmetry on the Ton / Toff at 50 % duty cycle. At frequency 400 hz i measured Ton: 1.183ms and Toff : 1.318 ms. After adding an offset of 3.0 % to 50 % the asymmetry is compensated.

The problem  (when the device is cold) is that after power up i measure  Ton:1.280 ms, Ton:1.220 ms and only after 20 – 25 minutes the compensation becomes active. Drifts slowly to Ton:1.253ms, Toff:1.247ms. Could be a device hardware drift?

Looks like there is need to warmup for the first power up.

 

 

 

 

[Autore]

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