SMSC COM20020 manual Configuration Register Setup Register

Configuration Register Setup Register

The Configuration Register is a read/write register which is used to configure the different modes of the COM20020. The Configuration Register defaults to the value 0001 1000 upon hardware reset only. SUBAD0 and SUBAD1 point to selection in Register 7.

The Setup Register is a read/write 8-bit register accessed when the Sub Address Bits are set up accordingly (see the bit definitions of the Configuration Register). The Setup Register allows the user to change the network speed

(data rate) or the arbitration speed independently, invoke the Receive All feature, change the nPULSE1 driver type, and reduce protocol timeouts by a factor of 3. The data rate may be slowed to 156.25Kbps and/or the arbitration speed may be slowed by a factor of two. The Setup Register defaults to the value 0000 0000 upon hardware reset only.

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