TNETA1585

ATM TRAFFIC MANAGEMENT SCHEDULER DEVICE

WITH RECEIVE UTOPIA AND COPROCESSOR INTERFACES

SDNS041A – NOVEMBER 1996 – REVISED JULY 1998

15

POST OFFICE BOX 655303

receive-UTOPIA interface (continued)

In ATM mode, the TNETA1585 receive-UTOPIA interface behaves as an RX UTOPIA, monitoring incoming cells

from a framer such as the TNETA1500 into the reassembly interface of a SAR device such as the TNETA1575.

An external clock input provides for data transfers/synchronization between the TNETA1585 receive-UTOPIA

and TNETA1500 interfaces.

In PHY mode, the TNETA1585 receive-UTOPIA interface behaves as a TX UTOPIA of a PHY device, monitoring

incoming cells from a switching element into the reassembly interface of a SAR device such as the TNETA1575.

An external clock input provides for data transfers/synchronization between the TNETA1585 receive-UTOPIA

and ATM switching-element TX UTOPIA interfaces.

The receive-UTOPIA interface operates as a synchronous 8-bit (byte-wide) data path. The interface functions

with cell-level handshaking. The maximum clock speed supported by this interface is 33 MHz.

receive-UTOPIA interface in PHY mode

The receive-UTOPIA interface on the TNETA1585 operates as the TX UTOPIA interface in a PHY device when

the TNETA1585 is operating in PHY mode.

This cell interface works on the low-to-high transition of RXCLK to sample and generate signals.

TNETA1585

SIGNAL NAME

UTOPIA

SIGNAL NAME

RXCLK

TXCLK

RXDATA7–RXDATA0

TXDATA7–TXDATA0

RXSOC

TXSOC

RXEN

TXEnb

RXCLAV

TXClav