DS80C410 Datasheet, PDF (53/102 Pages) Dallas Semiconductor – Network Microcontrollers with Ethernet and CAN

DS80C410/DS80C411 Network Microcontrollers with Ethernet and CAN
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
EXTERNAL
PHY(s)
MII MANAGEMENT
BLOCK
<SERIAL
INTERFACE BUS TO
EXTERNAL PHY(s)>
MII I/O BLOCK
(TRANSMIT,
RECEIVE, AND
FLOW CONTROL)
POWER MANAGEMENT
BLOCK
CSR REGISTERS
ADDRESS CHECK
BLOCK
Tx/Rx BUFFER
MEMORY
(8kB)
BCU
DS80C400
CPU
DS80C400 ON-CHIP ETHERNET CONTROLLER
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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