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DS80C410 Datasheet(PDF) 53 Page - Dallas Semiconductor |
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DS80C410 Datasheet(HTML) 53 Page - Dallas Semiconductor |
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53 / 102 page  DS80C410/DS80C411 Network Microcontrollers with Ethernet and CAN 53 of 102 For full-duplex mode operation, the physical media connects the DS80C410 directly to only one other station, allowing simultaneous transmit and receive activity between the two without risk of collision. Hence, no media- access method (i.e., CSMA/CD) needs to be used. For full-duplex operation, the flow control mechanism is the PAUSE control frame. When needing time to free additional receive data buffers, the DS80C410 can initiate a PAUSE control frame, requesting that the other station suspend transmission attempts for a specified number of time slots. Figure 3. Ethernet Controller Block Diagram MII MANAGEMENT BLOCK <SERIAL INTERFACE BUS TO EXTERNAL PHY(s)> MII I/O BLOCK (TRANSMIT, RECEIVE, AND FLOW CONTROL) CSR REGISTERS ADDRESS CHECK BLOCK POWER MANAGEMENT BLOCK BCU Tx/Rx BUFFER MEMORY (8kB) EXTERNAL PHY(s) DS80C400 ON-CHIP ETHERNET CONTROLLER DS80C400 CPU NOTE: WHEN CONNECTING THE DS80C400 TO AN EXTERNAL PHY, DO NOT CONNECT THE RSTOL TO THE RESET OF THE PHY. DOING SO MAY DISABLE THE ETHERNET TRANSMIT. |
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