| 摘要 |
Input and output buffer circuitry (12, 14, 16) is provided which are compatible with busses operating at different voltage levels. The buffer circuitry is self-configuring based on the type of bus to which it is coupled. The buffer circuitry includes voltage level detect circuitry (20) and pad level detect circuitry (28) which can reconfigure driver (34, 54) and level shifter circuits (24, 26) in order to protect the switching devices of the buffers.
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