PM7340-PI datasheet(42/334 Pages) PMC

42 / 334 page

PRELIMINARY

INVERSE MULTIPLEXING OVER ATM

PM7340 S/UNI-IMA-8

DATA SHEET

PMC-2001723

ISSUE 3

INVERSE MULTIPLEXING OVER ATM

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

Pin Name

Type

No.

Function

TSOC

Input

H19

The Transmit Start of Cell (TSOC) is an active high

signal that marks the first word of the cell on the

TDAT[15:0] bus.

The TSOC input is sampled on the rising edge of

TCLK.

TDAT[15]

TDAT[14]

TDAT[13]

TDAT[12]

TDAT[11]

TDAT[10]

TDAT[9]

TDAT[8]

TDAT[7]

TDAT[6]

TDAT[5]

TDAT[4]

TDAT[3]

TDAT[2]

TDAT[1]

TDAT[0]

Input

H21

H20

F19

G22

G21

F22

G20

F21

E22

C20

E21

C22

E20

D21

C21

B22

The Transmit Cell Data (TDAT[15:0]) signals carry

the ATM cell octets that are transferred to the

internal cell buffer. The TDAT[15:0] signals are

considered valid only when the TENB signal is

asserted low. When this interface is operating in 8-

bit mode, only TDAT[7:0] is used.

The TDAT[15:0] input bus is sampled on the rising

edge of TCLK.

TPRTY

Input

D20

The Transmit Parity (TPRTY) signal provides the

parity (programmable for odd or even parity) of the

TDAT[15:0] bus. The TPRTY signal is valid only

when valid data is transferring as indicated by the

TENB signal asserted low. When this interface is

operating in 8-bit mode, this signal provides the

parity of TDAT[7:0].

A parity error is indicated by a status bit and a

maskable interrupt.

The TPRTY input signal is sampled on the rising

edge of TCLK.

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