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Power Supply Range

TE0320 requires only one power supply with a supply voltage between 4.0 V and 7.0 V. Power consumption depends on the active design.

Power Supply Sources

TE0320 can be power supplied in two ways:

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On Board Power Rails

According to the Xilinx Spartan-3A DSP literature, there are the following power supply pin types:

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1. 1. if resistor R131 is not populated and R132 is populated, VCCCIO0 power rail is set to power rail 2.5V (nominal voltage = 2.5 V).

      Scroll pdf title
      title Assembly option for VCCIO0= 2.5 V (bottom view).

      Note
      Pins 30 and 44 of JM4 are power supply inputs in this case.

       

   2. if resistor R131 is populated and R132 is not populated, VCCCIO0 power rail is set to power rail 3.3V (nominal voltage = 3.3 V). This is the default.
      

      Scroll pdf title
      title Assembly option for VCCCIO0 = 3.3 V (bottom view).

      Note
      Pins 30 and 44 of JM4 are power supply outputs in this case.

   3. if both resistors R131 and R132 are not populated, VCCCIO0 power can be supplied through pins 30 and 44 of B2B connector JM4.
      
      

      Scroll pdf title
      title Assembly option for VCCAUX = off (bottom view)

      Note
      Pins 30 and 44 of JM4 are power supply outputs in this case.

       
      

      Warning
      Assembly option where both R131 and R132 are populated is not allowed.

Power Supervision

Power-on Reset

During power-on, the /RESET line is first asserted. Thereafter, the supply voltage supervisor monitors the power supply rail 3.3V and keeps the /RESET line active (low) as long as the rail remains below the threshold voltage (2.93 V). An internal timer delays the return of the /RESET line to the inactive state (high) to ensure proper system reset. The delay time of 200 ms starts after the rail has risen above the threshold voltage.

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Scroll pdf title
title Reset assertion on power drop with fixed delay time of 200 ms.

Power-on Reset

TE0320 integrates a power-fail comparator which can be used for low-battery detection, power-fail warning, or for monitoring Vsup power rail.

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