Datenblatt-Suchmaschine für elektronische Bauteile |
|
TSB41LV06PZP Datenblatt(PDF) 3 Page - Texas Instruments |
|
TSB41LV06PZP Datenblatt(HTML) 3 Page - Texas Instruments |
3 / 39 page TSB41LV06 IEEE 1394a SIX-PORT CABLE TRANSCEIVER/ARBITER SLLS289 – JANAURY1999 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 When the TSB41LV06 is used with one or more of the ports not brought out to a connector, the twisted–pair terminals of the unused ports must be terminated for reliable operation. For each unused port, the TPB+ and TPB– terminals should be tied together and then pulled to ground, or the TPB+ and TPB– terminals should be connected to the suggested termination network. The TPA+ and TPA– and TPBIAS terminals of an unused port may be left unconnected. The TPBias terminal should be connected to a 1- µF capacitor to ground or left floating. The TESTM, SE, and SM terminals are used to set up various manufacturing test conditions. For normal operation, the TESTM terminal should be connected to VDD, SE should be tied to ground through a 1-kΩ resistor, while SM should be connected directly to ground. Four package terminals are used as inputs to set the default value for four configuration status bits in the self–ID packet, and are hardwired high or low as a function of the equipment design. The PC0–PC2 terminals are used to indicate the default power-class status for the node (the need for power from the cable or the ability to supply power to the cable). See Table 9 for power-class encoding. The C/LKON terminal is used as an input to indicate that the node is a contender for either isochronous resource manager (IRM) or bus manager (BM). The PHY supports suspend/resume as defined in the IEEE P1394a specification. The suspend mechanism allows pairs of directly–connected ports to be placed into a low power conservation state while maintaining a port–to–port connection between 1394 bus segments. While in a low–power state, a port is unable to transmit or receive data transaction packets. However, a port in a low power state is capable of detecting connection status changes and detecting incoming TPBias. When all six ports of the TSB41LV06 are suspended all circuits except the bandgap reference generator and bias detection circuits are powered down resulting in significant power savings. For additional details of suspend/resume operation refer to the P1394a specification. The use of suspend/resume is recommended for new designs. The port transmitter and receiver circuitry is disabled during power-down (when the PD input terminal is asserted high), during reset (when the RESET input terminal is asserted low), when no active cable is connected to the port, or when controlled by the internal arbitration logic. The TPBIAS is disabled during power–down, during reset, or when the port is disabled as commanded by the LLC. The CNA (cable-not-active) terminal provides a high output when all twisted-pair cable ports are disconnected, and can be used along with LPS to determine when to power–down the TSB41LV06. The CNA output is not debounced. In a PD terminal initiated power down, the CNA detection circuitry remains enabled. The LPS (link power status) terminal works with the C/LKON terminal to manage the power usage in the node. The LPS signal from the LLC indicates to the PHY that the LLC is powered up and active. During LLC power-down mode, as indicated by the LPS input being low for more than 2.6 µs, the TSB41LV06 deactivates the PHY-LLC interface to save power. The TSB41LV06 will continue the necessary repeater function required for network operation during this low power state. If the PHY receives a link-on packet from another node, the C/LKON terminal is activated to output a square-wave signal. The LLC recognizes this signal, reactivates any powered-down portions of the LLC, and notifies the PHY of its power-on status via the LPS terminal. The PHY confirms notification by deactivating the square-wave signal on the C/LKON terminal, and then enables the PHY-link interface. |
Ähnliche Teilenummer - TSB41LV06PZP |
|
Ähnliche Beschreibung - TSB41LV06PZP |
|
|
Link URL |
Privatsphäre und Datenschutz |
ALLDATASHEETDE.COM |
War ALLDATASHEET hilfreich? [ DONATE ] |
Über Alldatasheet | Werbung | Kontakt | Privatsphäre und Datenschutz | Linktausch | Hersteller All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |