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Table 14: Slide switch S2 settings overview ( 1.2V , 2.5V, VCCIO0).
Slide Switch S2 = FX2 PON
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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.
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- FPGA core logic (1.2V)
- DDR SDRAM (2.5V)
- FPGA bank 3 (2.5V)
- VREF (2.5V)
- VCCCIO0 (2.5V) FPGA bank 0
Slide Switch S2 = FX2 PON
When slide switch S2 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.
Figure 34: S2 on position PON.
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