MT9079 datasheet(31/54 Pages) MITEL

Part #	MT9079

Description	CMOS ST-BUS??FAMILY Advanced Controller for E1

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Manufacturer	MITEL [Mitel Networks Corporation]

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MT9079

4-267

Bit

Name

Functional Description

7

MFSYI

(0)

Multiframe

Synchronization

Inter-

rupt. When unmasked an interrupt is

initiated when multiframe synchroni-

zation is lost. 1 - unmasked, 0 -

masked.

Interrupt

vector

=

10000000.

6

CSYNI

(0)

CRC-4 Multiframe Alignment. When

unmasked an interrupt is initiated

when CRC-4 multiframe synchroni-

zation is lost. 1 - unmasked, 0 -

masked.

Interrupt

vector

=

10000000.

5RFALI

(0)

Remote

Failure

Interrupt.

When

unmasked an interrupt is initiated

when the near end detects a failure

of the remote end CRC-4 process

based on the receive E-bit error

count. See the RFAIL status bit

description of page 3, address 19H. 1

- unmasked, 0 - masked. Interrupt

vector = 10000000.

4YI

(0)

Remote Multiframe Loss Interrupt.

When unmasked an interrupt is initi-

ated when a remote multiframe alarm

signal is received. 1 - unmasked, 0 -

masked.

Interrupt

vector

=

10000000.

3

1SECI

(0)

One

Second

Status.

When

unmasked an interrupt is initiated

when the 1SEC status bit changes

state. 1 - unmasked, 0 - masked.

Interrupt vector = 00001000.

2STOP

(0)

Stop Interrupt. When unmasked an

interrupt

is

initiated

when either

STOP0, STOP1, STOP0 or STOP1 is

high and a match or a mismatch

between the received data, and the

data in the code detect word (CDW)

and detect word mask (DWM). 1 -

unmasked, 0 - masked. Interrupt vec-

tor = 00000010.

1STRT

(0)

Start Interrupt. When unmasked an

interrupt

is

initiated

when either

START0,

START1,

START0

or

START1 is high and a match or a

mismatch

is

made

between

the

received data, and the data in the

code detect word (CDW) and detect

word mask (DWM). 1 - unmasked, 0 -

masked.

Interrupt

vector

=

00000010.

0DATA

(0)

Data Interrupt. When unmasked an

interrupt is initiated when the data

received in selected time slots (per

time slot control words) matches the

data in the code detect word (CDW).

1 - unmasked, 0 - masked. Interrupt

vector = 00000010.

Table 39 - Interrupt Mask Word Three

(Page 1, Address 1EH)

Control Page 2

Tables 40 to 50 describe the bit functions of the page

2 control registers. ( ) in the “Name” column of these

tables indicates the state of the control bit after a

RESET or RST function.

Bit

Name

Functional Description

7

BPVE

(0)

Bipolar

Violation

Error

Insertion.

A

zero-to-one transition of this inserts a

single bipolar violation error into the

transmit PCM 30 data. A one, zero or

one-to-zero transition has no function.

6

CRCE

(0)

CRC-4 Error Insertion. A zero-to-one

transition of this bit inserts a single

CRC-4 error into the transmit PCM 30

data. A one, zero or one-to-zero transi-

tion has no function.

5FASE

(0)

Frame Alignment Signal Error Insertion.

A zero-to-one transition of this bit inserts

a single error into the time slot zero

frame alignment signal of the transmit

PCM

30

data.

A

one,

zero

or

one-to-zero transition has no function.

4

NFSE

(0)

Non-frame Alignment Signal Error Inser-

tion. A zero-to-one transition of this bit

inserts a single error into bit two of the

time slot zero non-frame alignment sig-

nal of the transmit PCM 30 data. A one,

zero or one-to-zero transition has no

function.

3

LOSE

(0)

Loss of Signal Error Insertion. If one, the

MT9079 transmits an all zeros signal

(no pulses) in every PCM 30 time slot.

When

HDB3 encoding is activated no

violations are transmitted. If zero, data is

transmitted normally.

2 - 1

---

Unused.

0

DBNCE

(0)

Debounce Select. This bit selects the

debounce period (1 for 14 msec.; 0 for

no debounce). Note: there may be as

much as 2 msec. added to this duration

because the state change of the signal-

ling equipment is not synchronous with

the PCM 30 signalling multiframe.

Table 40 - Error and Debounce Selection Word

(Page 2, Address 10H)

Bit

Name

Functional Description

7 - 0

CMP7

-

CMP0

(00H)

Bit Error Rate Compare Word 7 to 0.

CMP7 is the most significant bit and

CMP0 is the least significant bit of a bit

pattern that is compared with the data of

the selected receive circular buffer one.

When individual bit mismatches are

detected the Bit Error Rate Counter

(BERC) is incremented.

Table 41 - Bit Error Rate Compare Word

(Page 2, Address 11H)

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