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TNETA1585PCM Datasheet(PDF) 14 Page - Texas Instruments

Part No. TNETA1585PCM
Description  ATM TRAFFIC MANAGEMENT SCHEDULER DEVICE WITH RECEIVE UTOPIA AND COPROCESSOR INTERFACES
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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TNETA1585PCM Datasheet(HTML) 14 Page - Texas Instruments

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TNETA1585
ATM TRAFFIC MANAGEMENT SCHEDULER DEVICE
WITH RECEIVE UTOPIA AND COPROCESSOR INTERFACES
SDNS041A – NOVEMBER 1996 – REVISED JULY 1998
14
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TNETA1585-to-TNETA1575 interconnection
Figure 1 shows the interconnection of the TNETA1575 SAR and the TNETA1585 traffic management scheduler.
CTRL
AD
TNETA1575
SAR
8
SRAM
64K
× 32 or
32K
× 32
TNETA1585
Traffic Management
Scheduler
SCDATA(31–0)
SCAD(5–0)
SCOE
SCWE
SCSEL
RESET
INTR
TCCX
RCCX
DAX
COPFULL
Control Memory
Parameter Memory
SRAM
64K
× 32 or
32K
× 32
Figure 1. TNETA1585 Interconnection to TNETA1575
receive-UTOPIA interface
The TNETA1585 receives ATM cells through a receive-UTOPIA level-1 interface with cell-level handshake only.
This interface is configurable as either an 8-bit PHY or ATM interface. The ATM mode is chosen when the
TNETA1585 interfaces with a framer (such as the TNETA1500). The PHY mode is chosen when the
TNETA1585 interfaces with a switch port. The operation of this dual PHY/ATM interface requires connection
of the UTOPIA signals to the appropriate input terminals of the TNETA1585.
In both modes, the receive UTOPIA interface on the TNETA1585 monitors only, i.e., the device does not actively
participate in the UTOPIA protocol. If the system is to work correctly, a fully compliant UTOPIA-peer device is
required. This interface is designed so that the TNETA1585 could be connected as a peer to the TNETA1575,
which are both then connected to an ATM (e.g., switch port) or PHY device.


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