MT9072AB datasheet(29/275 Pages) ZARLINK

29 / 275 page

MT9072

Data Sheet

Zarlink Semiconductor Inc.

114

134

154

M14

H16

C14

DSTi[1]

DSTi[2]

DSTi[3]

DSTi[5]

DSTi[6]

DSTi[7]

Data ST-BUS. In 2.048 Mbit/s ST-BUS mode and IMA mode this pin is

an input for the transmit side of the framer. This pin is not used in

8.192 Mbit/s ST-BUS mode. The DSTi data stream is clocked into the

framer by the clock input to pin CKi. Pins DSTi[0-7] are used by

Framers[0-7] respectively.

In T1 mode, this pin accepts a 2.048 Mbit/s ST-BUS stream. The first

24 ST-BUS channels contain the data to be transmitted on the PCM24

interface. See Table 1.

In T1 IMA mode, this pin accepts a 1.544 Mbit/s serial stream that

contains a framing bit followed by the 24 8-bit channels to be

transmitted on the PCM24 interface, see Table 3. The framing bit is

ignored and an internally generated framing bit is used. IMA mode is

selected by setting the IMA bit (Address Y00) to 1.

In E1 mode, this pin accepts a 2.048 Mbit/s ST-BUS stream that

contains the data to be transmitted on the PCM30 interface. See Table

4 and Table 6.

In E1 IMA mode, this pin accepts a 2.048 Mbit/s ST-BUS stream that

contains the data to be transmitted on the PCM30 interface. IMA mode

is selected by setting the IMA bit (Address Y00) to 1. See Table 4 and

Table 6.

T13

DSTo[0]

DSTo[4]

Data ST-BUS. This pin is an output for the receive side of the framer.

In 2.048 Mbit/s ST-BUS mode and IMA mode it operates the same as

DSTo(1-3), it can also operate in 8.192 Mbit/s ST-BUS mode. IMA

mode is not available at 8.192 Mbit/s. The DSTo data stream is

clocked out of the framer by the clock input to pin CKi.

When operated in 8.192 Mbit/s ST-BUS mode this pin outputs a data

stream containing 128 8-bit channels accommodating four framers.

See Table 2 and Table 5. The frame boundary is indicated by the FPi

inputs. Pin DSTo[0] is used by Framers[0-3] and pin DSTo[4] is used

by Framers[4-7].

The 32 ST-BUS channels mapped to each framer are treated as

described for DSTi(1-3) operating at 2.048 Mbit/s.

Pin Description (continued)

Pin #

Name

Type

Description (see Notes 1 to 7)

LQFP

LBGA

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