MT9072AB datasheet(28/275 Pages) ZARLINK

28 / 275 page

MT9072

Data Sheet

Zarlink Semiconductor Inc.

113

133

153

T11

M13

H15

C13

RxMF[0]

RxMF[1]

RxMF[2]

RxMF[3]

RxMF[4]

RxMF[5]

RxMF[6]

RxMF[7]

Receive Multiframe Boundary. This pin provides a pulse that

identifies basic frame 0 (the start of bit cell 7 of channel 0) of each

received multiframe on the ST-BUS data stream (DSTo). The RxMF

pin operates the same way in 2.048 Mbit/s and 8.196 Mbit/s modes.

Pins RxMF[0-7] are used for Framers[0-7] respectively.

In T1 mode, the RxMF pulse is 244 ns wide and its center identifies

basic frame 0 of the received multiframe. If the Tx8KEN control bit

(Address YF1) is 1 then the RxMF pin outputs an 8kHz frame pulse

synchronous with the data stream on TPOS/TNEG. See Figure 43 and

Figure 45.

In T1 IMA mode, the frame pulse duration is 648 ns.

In E1 mode, (and E1 IMA mode) the RxMF pulse is 244 ns wide and

its center identifies basic frame 0 of the received CAS (Channel

Associated Signaling) multiframe boundary or the received CRC-4

multiframe boundary as determined by the MFSEL control bit

(Address Y02). If the Tx8KEN control bit (Address Y02) is 1 then the

RxMF pin outputs and 8 kHz frame pulse synchronous with the data

stream on TPOS/TNEG. See Figure 62 and Figure 64.

T12

DSTi[0]

DSTi[4]

Data ST-BUS. This pin is an input for the transmit side of the framer. In

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

DSTi(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 DSTi data stream is clocked

into the framer by the clock input to pin CKi.

When operated in 8.192 Mbit/s ST-BUS mode this pin accepts 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 DSTi[0] is used by Framers[0-3] and pin DSTi[4] is used by

Framers[4-7].

In 8.192 Mbit/s mode, 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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