TNETA1575

ATM SEGMENTATION AND REASSEMBLY DEVICE

WITH PCI-HOST AND COPROCESSOR INTERFACES

SDNS040C – MAY 1996 – REVISED JUNE 1998

14

POST OFFICE BOX 655303

segmentation interface in ATM mode

The segmentation-unit interface on the TNETA1575 operates as a TX UTOPIA interface in an ATM-layer device.

The PHY/ATM terminal must be driven low to make the TNETA1575 operate in ATM 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

TXCLK

SEGDATA7–SEGDATA0

84–87, 89–92

TXDATA7–TXDATA0

SEGPAR

94

TXPRTY

SEGSOC

97

TXSOC

SEGEN

96

TXCLAV/TXFULL

SEGCLAV

98

TXENB

reassembly interface in ATM mode

The reassembly-unit interface on the TNETA1575 operates as the RX UTOPIA interface in an ATM device when

the TNETA1575 is configured in ATM mode.

This receive 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

RXCLK

RESDATA7–RESDATA0

72–75, 77–80

RXDATA7–RXDATA0

RESPAR

71

RXPRTY

RESSOC

70

RXSOC

RESEN

67

RXCLAV/RXEMPTY

RESCLAV

69

RXENB

RESPERR

81

N/A