TNETA1575

ATM SEGMENTATION AND REASSEMBLY DEVICE

WITH PCI-HOST AND COPROCESSOR INTERFACES

SDNS040C – MAY 1996 – REVISED JUNE 1998

12

POST OFFICE BOX 655303

segmentation interface, PHY mode

The segmentation-unit interface on the TNETA1575 operates as the RX UTOPIA interface on a PHY device

when the TNETA1575 is operating in PHY mode. The PHY/ATM input terminal has to be high to operate in PHY

mode.

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

are active high, unless noted with a bar above the signal name.

TNETA1575 SIGNAL NAME

TNETA1575 TERMINAL NUMBER

UTOPIA SIGNAL NAME

SEGCLK

95

RXCLK

SEGDATA7–SEGDATA0

84–87, 89–92

RXDATA7–RXDATA0

SEGPAR

94

RXPRTY

SEGSOC

97

RXSOC

SEGEN

96

RXENB

SEGCLAV

98

RXCLAV/RXEMPTY

reassembly interface, PHY mode

The reassembly-unit interface on the TNETA1575 functions as the TX UTOPIA interface in a PHY device when

the TNETA1575 is operating in PHY mode.

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

All signals are active high, unless noted with a bar above the signal name.

TNETA1575 SIGNAL NAME

TNETA1575 TERMINAL NUMBER

UTOPIA SIGNAL NAME

RESCLK

66

TXCLK

RESDATA7–RESDATA0

72–75, 77–80

TXDATA7–TXDATA0

RESPAR

71

TXPRTY

RESSOC

70

TXSOC

RESEN

67

TXENB

RESCLAV

69

TXCLAV/TXFULL

RESPERR

81

N/A