DC and AC Characteristics ------------------------- FROG contains 196 I/O pins, whose details are summarized in the following tables. I/O usage and port information ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. table:: I/O usage and sizes +-----------+------------------------------------------------------------------------+-------------+ | I/O Type | Description | No. of Pins | +===========+========================================================================+=============+ | Data I/O | Datapath I/Os of FPGA fabric | 80 | +-----------+------------------------------------------------------------------------+-------------+ | VDD_core | VDD supply for FPGA core | 28 | +-----------+------------------------------------------------------------------------+-------------+ | VSS_core | VSS supply for FPGA core | 28 | +-----------+------------------------------------------------------------------------+-------------+ | VDD_io | VDD supply for FPGA I/Os | 16 | +-----------+------------------------------------------------------------------------+-------------+ | VSS_io | VSS supply for FPGA I/Os | 16 | +-----------+------------------------------------------------------------------------+-------------+ | Clk | Operating clock of FPGA core | 1 | +-----------+------------------------------------------------------------------------+-------------+ | Reset | Reset flip-flop contents to logic '0' | 1 | +-----------+------------------------------------------------------------------------+-------------+ | ProgClk | Clock used by configuration protocol to program FPGA fabric | 1 | +-----------+------------------------------------------------------------------------+-------------+ | ProgReset | Reset configurable memories to logic '0' | 1 | +-----------+------------------------------------------------------------------------+-------------+ | CCin | Input of configuation protocol to load bitstream | 1 | +-----------+------------------------------------------------------------------------+-------------+ | CCout | Output of configuration protocol to read back bitstream | 1 | +-----------+------------------------------------------------------------------------+-------------+ | TestEn | Activate the test mode of FPGA fabric | 1 | +-----------+------------------------------------------------------------------------+-------------+ | SCin | Input of built-in scan-chain to load data to flip-flops of FPGA fabric | 1 | +-----------+------------------------------------------------------------------------+-------------+ | SCout | Output of built-in scan-chain to read back flip-flops from FPGA fabric | 1 | +-----------+------------------------------------------------------------------------+-------------+ | Spypad | Spypads for debugging. See details in spypad section | 14 | +-----------+------------------------------------------------------------------------+-------------+ | Total | | 191 | +-----------+------------------------------------------------------------------------+-------------+ Recommended Operating Conditions ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ .. table:: Recommended Operating Conditions +----------+------------------------------+------+------+-------+ | Symbol | Description | Min | Max | Units | +==========+==============================+======+======+=======+ | VDD_io | Supply voltage for I/Os | 1.26 | 2.34 | V | +----------+------------------------------+------+------+-------+ | VDD_core | Supply voltage for FPGA core | 0.56 | 1.04 | V | +----------+------------------------------+------+------+-------+ | V_in | Input voltage for other I/Os | 0.56 | 1.04 | V | +----------+------------------------------+------+------+-------+ | I_in | Maximum current through pins | N/A | 4 | mA | +----------+------------------------------+------+------+-------+ | f_max | Maximum frequency of I/Os | N/A | 70 | MHz | +----------+------------------------------+------+------+-------+ Typical AC Characteristics ^^^^^^^^^^^^^^^^^^^^^^^^^^ .. table:: Typical AC characteristics for FPGA I/Os +-----------------+-------------------------------------------+------+------+-------+ | Symbol | Description | Min | Max | Units | +=================+===========================================+======+======+=======+ | V_in Overshoot | Maximum allowed overshoot voltage for Vin | 2.34 | 2.34 | V | +-----------------+-------------------------------------------+------+------+-------+ | V_in Undershoot | Minimum allowed overshoot voltage for Vin | 1.26 | 1.26 | V | +-----------------+-------------------------------------------+------+------+-------+ | I_VDD_core | Quiescent VDD_core supply current | 5000 | 5000 | mA | +-----------------+-------------------------------------------+------+------+-------+ | I_VDD_io | Quiescent VDD_io supply current | TBD | TBD | mA | +-----------------+-------------------------------------------+------+------+-------+