DM8603EP DAVICOM [Davicom Semiconductor, Inc.], DM8603EP Datasheet - Page 93

• Manufacturer Part Number: DM8603EP
• Description: 10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
• Manufacturer: DAVICOM [Davicom Semiconductor, Inc.]

9.4.3
the coding scheme is Manchester. Data processed for transmit is presented in nibble format, converted to a
serial bit stream, then the Manchester encoded. When receiving, the bit stream, encoded by the Manchester,
is decoded and converted into nibble format.
9.4.4
simultaneously. Collision detection is disabled in full duplex operation.
9.4.5
full-duplex mode, CRS is asserted only during Receive operations.
9.4.6
and to automatically configure both devices to take maximum advantage of their abilities. It is important to
note that Auto-negotiation does not test the characteristics of the linked segment. The Auto-Negotiation
function provides a means for a device to advertise supported modes of operation to a remote link partner,
acknowledge the receipt and understanding of common modes of operation, and to reject un-shared modes
of operation. This allows devices on both ends of a segment to establish a link at the best common mode of
operation. If more than one common mode exists between the two devices, a mechanism is provided to
allow the devices to resolve to a single mode of operation using a predetermined priority resolution function.
Auto-negotiation feature. During Parallel detection there is no exchange of information of configuration.
Instead, the receive signal is examined. If it is discovered that the signal matches a technology, which the
receiving device supports, a connection will be automatically established using that technology. This allows
devices not to support Auto-negotiation but support a common mode of operation to establish a link.
Preliminary datasheet
DM8603-12-DS-P01
November 8, 2010
The 10Base-T transceiver is IEEE 802.3u compliant. When the DM8603 is operating in 10Base-T mode,
For half-duplex operation, a collision is detected when the transmit and receive channels are active
Carrier Sense (CRS) is asserted in half-duplex operation during transmission or reception of data. During
The objective of Auto-negotiation is to provide a means to exchange information between linked devices
Auto-negotiation also provides a parallel detection function for devices that do not support the
10Base-T Operation
Collision Detection
Carrier Sense
Auto-Negotiation
10/100 Mbps 3-port Ethernet Switch Controller with MII / RMII Interface
DM8603
93