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[/] [scan_based_serial_communication/] [trunk/] [SCAN_README.txt] - Diff between revs 4 and 11

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        David Fick - dfick@umich.edu
        David Fick - dfick@umich.edu
 
 
VERSION
VERSION
        1.0 - June 27, 2010
        1.0 - June 27, 2010
        1.1 - January 7, 2011
        1.1 - January 7, 2011
 
        1.2 - Feb 7, 2013
 
 
SCAN DESCRIPTION
SCAN DESCRIPTION
        This is a simple scan chain implemented with deperlify. It has been
        This is a simple scan chain implemented with deperlify. It has been
        used, successfully, on multiple tapeouts.
        used, successfully, on multiple tapeouts.
 
 
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        are much smaller than the muxing elements needed for the
        are much smaller than the muxing elements needed for the
        chain. Since this is a new feature, the size specified by the
        chain. Since this is a new feature, the size specified by the
        address and data bits should most likely match the total size
        address and data bits should most likely match the total size
        in order to avoid bugs.
        in order to avoid bugs.
 
 
 
        An optional research field is included in the scan signal list.
 
        When the scan reset bet is set to 1, all bits in the scan chain
 
        are set to their optional reset value when specified, or zero
 
        when it is not specified.
 
 
        Due to the buffering latches, complex internal interfaces can be
        Due to the buffering latches, complex internal interfaces can be
        emulated using the scan chain. For instance, an SRAM could be
        emulated using the scan chain. For instance, an SRAM could be
        connected to a clock, chip select, write enable, 64-bit data-in,
        connected to a clock, chip select, write enable, 64-bit data-in,
        and 64-bit data-out, all of which are connected to the scan
        and 64-bit data-out, all of which are connected to the scan
        chain. The scan chain would need to be used a few times for each
        chain. The scan chain would need to be used a few times for each

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