Versions Compared

Old Version 9

changes.mady.by.user Sergio Pavesi

Saved on

compared with

New Version 10

changes.mady.by.user Sergio Pavesi

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

When slide switch S3 is in the left position ( = FX2 PON : power rails conditionally on depending on signal FX2_PS_EN), signal PS_EN is set to signal FX2_PS_EN (PS_EN = FX2_PS_EN) driven by the EZ-USB FX2LP USB FX2 microcontroller under user control (IOD and OED of fw.c).

Image Removed  Image Added

Figure 38: S3 on position FX2 PON (PS_EN = FX2_PS_EN = 1 or 0 ).  

  1. Dynamic full power operation (PS_EN = 1): when the EZ-USB FX2LP USB FX2 microcontroller sets signal PS_EN = FX2_PS_EN = high1, power rails 2.5V and 1.2V are enabled.
    This setting can be useful for .
  2. Dynamic low power operation (PS_EN = 0): when the EZ-USB FX2LP USB FX2 microcontroller resets signal PS_EN = FX2_PS_EN = low0, the following components are switched off:

...

Full power operation (PS_EN = 1): when slide switch S3 is in the right position (PON = power rails unconditionally on), signal PS_EN is set to power rail 3.3V. Thus power rails 2.5V and 1.2V are unconditionally enabled.

Image Removed  Image Added
Figure 39: S3 on position PON (PS_EN ≠ FX2_PS_EN = x; PS_EN = high ). 

...