MT9074AP datasheet(71/122 Pages) MITEL

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Advance Information

MT9074

3-0

- - -

Unused

Bit

Name

Functional Description

- - -

Unused.

- - -

Unused.

HDLC0

Select.

one,

then

HDLC0 is connected to the data

link on selected Sa bits at a rate of

4, 8, 12, 16 or 20 kbits/sec. If zero,

HDLC0

deselected

and

all

HDLC0 interrupts are masked.

HDLC1

Select.

one,

then

HDLC1 is connected to time slot

16 in CCS mode. If zero, HDLC1 is

deselected

and

all

HDLC1

interrupts are masked.

RxTRSP

Receive

Transparent

Mode.

When this bit is set to one, the

framing function is disabled on the

receive side. Data coming from the

receive line passes through the

slip buffer and drives DSTo with an

arbitrary alignment. When zero,

the

receive

framing

function

operates normally.

TxTRSP

Transmit Transparent Mode. If

one, the MT9074 is in transmit

transparent mode. No framing or

signaling is imposed on the data

transmit from DSTi onto the line. If

zero, it is in termination mode.

TIU1

Transmit International Use One.

When CRC-4 operation is disabled

(CSYN=1), this bit is transmit on

the PCM 30 2048 kbit/sec. link in

bit position one of time-slot zero of

non-frame-alignment frames. It is

reserved for international use and

should normally be kept at one. If

CRC processing is used, i.e.,

CSYN =0, this bit is ignored.

Table 81 - HDLC Selection Word (E1)

(Page 1, Address 12H)

Bit

Name

Functional Description

Table 80 - Transmit Alarm Control Word (E1)

(Page 1, Address 11H)

TIU0

Transmit International Use Zero.

When CRC-4 operation is disabled

(CSYN=1), this bit is transmit on

the PCM 30 2048 kbit/sec. link in

bit position one of time-slot zero of

frame-alignment

frames.

reserved for international use and

should normally be kept at one. If

CRC processing is used, i.e.,

CSYN =0, this bit is ignored.

Bit

Name

Functional Description

7-4

TMA1-4

Transmit Multiframe Alignment

Bits One to Four. These bits are

transmitted on the PCM 30 2048

kbit/sec. link in bit positions one to

four of time slot 16 of frame zero

of every signalling multiframe.

These bits are used by the far end

to identify specific frames of a

signalling multiframe. TMA1-4 =

0000 for normal operation.

This bit is transmitted on the PCM

2048

kbit/sec.

link

bit

position five of time slot 16 of

frame zero of every multiframe.

X1 is normally set to one.

This bit is transmitted on the PCM

2048

kbit/sec.

link

bit

position six of time slot 16 of

frame zero of every multiframe. It

is used to indicate the loss of

multiframe

alignment

the

remote end of the link. If one -

loss of multiframe alignment; if

zero

multiframe

alignment

acquired. This bit is ignored when

AUTY is zero (page 01H, address

10H).

Table 82 - Transmit Multiframe Alignment

Signal (E1)

(Page 1, Address 13H)

Bit

Name

Functional Description

Table 81 - HDLC Selection Word (E1)

(Page 1, Address 12H)

MT9074AP Datasheet(PDF) 71 Page - Mitel Networks Corporation

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