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TE0320 is provided with a slide switch S2.


Figure 33: Slide switch S2 (angle view).
Slide switch S2 conditions the value of signal PS_EN.

  • When slide switch S2 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 driven by the EZ-USB FX2LP USB FX2 microcontroller under user control.

    Figure 34: Slide switch S2 schematic.


    Figure 35: When slide switch S2 = FX2 PON, signal PS_EN is set to signal FX2_PS_EN driven by the EZ-USB FX2LP USB FX2 microcontroller under user control.
  • Signal PS_EN enables (high) or disables (low) power rails 2.5V and 1.2V.

    Figure 36:
  • According to the corresponding assembly option, power rail VCCCIO0 can depend or not on the 2.5V power rail.

  • Power-rail 3.3V is not controlled by signal PS_EN and is unconditionally enabled. 

 



  

Table 14 summarizes all switching options implied by slide switch S2 under the standard assembly option.

power rail

S2= PON

S2 = FX2 PON and
PS_EN = FX2_PS_EN = 1

S2 = FX2 PON and
PS_EN = FX2_PS_EN = 0

2.5V

on

on

off

1.2V

on

on

off

VCCCIO0 (= 2.5V)

on

on

off

VCCCIO0 (= 3.3V)

on

on

on

Table 14: Slide switch S2 settings overview.

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