| 摘要 |
<p>A multi-mode counter network and a method of testing the operation of the multi-mode counter network are disclosed. The multi-mode counter network comprises a counter circuit formed of a plurality of counter registers and a multiplexer circuit formed of a plurality of multiplexers wherein said multiplexers are connected to and associated with one of the registers and are operative to selectively vary the input signal communicated to the associated register such that the registers operate in one of a plurality of operational modes. By controlling the selection of the input signal communicated to the registers the network may be alternately configured to perform traditional counting functions or may be configured to provide a serial signal path for communicating a test pattern through the registers and multiplexers to test the operation of the multiplexers and registers. The test pattern is communicated through the circuit, bypassing counter enabling circuitry, and thus independent of the network counter rate.</p> |
