TP3 LEVEL3 Schematic

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   |                 +--------------------------------------------------------------------+                           |
   |     +--------+  |                                                                    |                           |
   |     |  REG   |  |                                             +----------+           |                           |
   |     |        |  |                                             |   MUX    |           |                           |
   |     |        |  |   +----------+    +------------------------->0         |           |                           |
   |  +-->        +--+--->          |    |                         |          |           +-+  +-----------+          |
   |  |  |        |      |          |    |                         |          |             |  |   MUX     |          |
   |  |  |        |      |          |    |   +-----------+         |          +-----------+ +-->0          |          |
   |  |  +-^------+      |    +     |    |   |           |         |          |           |    |           |          |
   |  |    |             |          +----+   |           |   0 +--->1         |           |    |           |          |
   |  |    |             |          |    |   |           |         |          |           |    |           +-----+---->
   |  |    |  1  +------->          |    +--->           |         +-----^----+           |    |           |     |    |
   |  |    |             +----------+        |     >     |               |                |    |           |     |    |
   |  |    |                                 |           +---------------+                +---->1          |     |    |
   |  |    |                                 |           |                                     |           |     |    |
   |  |    |                                 |           |                                     +-----------+     |    |
   |  |    |                      N +-------->           |                                                       |    |
   |  |    |                                 +-----------+                                                       |    |
CLK+-------+                                                                                                     |    |
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   |  +----------------------------------------------------------------------------------------------------------+    |
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