Technical Datasheet: DMEP Datasheet Through the Media Independent Interface (MII), the DM connects to the Medium Access Control (MAC) layer, . Details, datasheet, quote on part number: DM Company, Davicom Semiconductor Incorporated. Datasheet, Download DM datasheet. Quote. DM Datasheet PDF Download – 10/ Mbps FAST ETHERNET PHYSICAL LAYER SINGLE CHIP TRANSCEIVER, DM data sheet.

Author: Mezilabar Vijind
Country: Saint Lucia
Language: English (Spanish)
Genre: Health and Food
Published (Last): 12 March 2004
Pages: 310
PDF File Size: 20.57 Mb
ePub File Size: 8.98 Mb
ISBN: 972-5-42280-302-7
Downloads: 43775
Price: Free* [*Free Regsitration Required]
Uploader: Faecage

Re-initiates the auto-negotiation process.

DM9161 Datasheet PDF

Eatasheet Detection For half-duplex operation, a collision is detected when the transmit and receive channels are active simultaneously. Disclaimer The information appearing in this publication is believed to be accurate. In order to ensure quality transmission when employing MLT-3 encoding, the compensation must be able to adapt to various cable lengths and cable types depending on the installed environment.

This bit is self-clear after reset is completed. The designer should be careful not to cross the transmit and receive pairs. RXER will be asserted for 1 or more clock periods to indicate to the reconciliation sublayer that an error was detected somewhere in the frame being transmitted from the PHY to the reconciliation sublayer. Indicates that the interrupt is pending and is cleared by the current read. The Band Gap resistor should be placed as physically close to pin 47 and 48 as possible refer to Figure 1 and 2.

The result is a scrambled data stream with sufficient randomization to decrease radiated emissions at critical frequencies. The RJ connector and any unused pins should be tied to chassis ground through a resistor divider network and a 2KV bypass capacitor. Test mode control pin. If the samples you request exceed this amount we will contact you and show you the available options. Bad ground plane partitioning can cause more EMI emissions that could make the network interface card not compliant with specific FCC regulations part Reduced power down control enable: Integrated circuits sold by DAVICOM Semiconductor are covered by the warranty and patent indemnification provisions stipulated in the terms of sale only.


Datasheet Datasheet section Davicom Website. When waking up from Sleep mode write this bit to 0the configuration will go back to the state before sleep; but the state machine will be reset Remote loopout control: D1 and E1 are maximum plastic body size dimensions including mold mismatch. This bit will be automatically cleared when the register register 6 is read by management.

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.

If this bit is 1, it means the operation 1 mode is a 10M half duplex mode. The designer should not run any high-speed signal near the Band Gap resistor placement. 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. Force signal detector SD active. Conversely, the selection of short or intermediate cable lengths requiring less compensation will cause serious under-compensation for longer length cables.

Following the turnaround time, bit data is read from or written onto management registers. The Clock Recovery Module locks onto the data stream and extracts the Mhz reference clock.

DM datasheet_百度文库

Data processed for transmit is presented to the MII interface in nibble format, converted to a serial bit stream, then Manchester encoded. During full-duplex mode, CRS is asserted only during receive operations. These are stress ratings only. The DM provides a strong support for the autonegotiation function utilizing automatic media speed dataxheet protocol selection.

When this bit is set to 1, it indicates that the 10Mbps cable polarity is reversed. Accordingly, the reader datashert cautioned to verify that the data sheets and other information in this publication are current before placing orders. A fault detected via parallel detection function.

When this bit is set, the Speed status change will not generate the interrupt Link interrupt mask: If it is discovered that the signal matches a technology that the receiving device supports, a connection will be automatically established using that technology. Read as 0, ignore on write Polarity reversed: MLT-3 Driver The two binary data streams created at the MLT-3 converter are fed to the twisted pair output driver which converts these streams to current sources and alternately drives either side of the transmit transformer primary winding resulting in a minimal current MLT-3 signal.


Bit 19 to 24 of the OUI E are mapped to bit 15 to 10 of this register respectively Vendor model number: Jabber conditions will set this bit unless it is cleared by a read to this register through a management interface or a DM reset.

Dacom West GmbH – Smart solutions for you – DM

The MDIO pin is bi-directional and may be shared by up to 32 devices. Active high enables receive signals RXD[0: Dacom Ethernet Design-In Guide. Our currently available and soon to be released products are based on our proprietary designs and deliver high quality, high performance chipsets that comply with modem communication standards and Ethernet networking datawheet.

The power-down mode, selectacle 1: Sample Request To provide you with samples, we need to get some details. Serial Management Interface The serial control interface uses a simple two-wired serial interface to obtain and control the status of the physical layer through the MII interface. All LED pins are dual function pins, which can be configured as either active high or low by pulling them low or high accordingly.

Auto-Negotiation The objective of Auto-negotiation is to provide a means to exchange information between segment linked devices and to automatically configure both devices to take maximum advantage of their abilities. Without the scrambler, energy levels on the cable could peak beyond FCC limitations at frequencies related to repeated 5B sequences like continuous transmission of IDLE symbols.