DS80C410 Maxim, DS80C410 Datasheet - Page 53

• Manufacturer Part Number: DS80C410
• Description: The DS80C410/DS80C411 network microcontrollers offer the highest integration available in an 8051 device
• Manufacturer: Maxim

EXTERNAL
incoming frames transmitted by other stations. Using this back-pressure scheme gives the DS80C410 control of
the network or time to free up needed receive data buffers.
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
PHY(s)
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.
INTERFACE BUS TO
EXTERNAL PHY(s)>
MII MANAGEMENT
FLOW CONTROL)
RECEIVE, AND
MII I/O BLOCK
(TRANSMIT,
<SERIAL
BLOCK
DS80C400 ON-CHIP ETHERNET CONTROLLER
POWER MANAGEMENT
ADDRESS CHECK
CSR REGISTERS
53 of 102
BLOCK
BLOCK
Tx/Rx BUFFER
MEMORY
(8kB)
BCU
DS80C400
CPU