MT9079AC datasheet(33/54 Pages) MITEL

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MT9079

4-269

Bit

Name

Functional Description

7 - 0

EFLD7

EFLD0

Errored

Frame

Alignment

Load

Word. This bit pattern is loaded into

the errored frame alignment signal

counter when LDEF is toggled (valid

in ST-BUS mode only).

Table 46 - Errored Frame Alignment Load Word

(Page 2, Address 1AH)

Bit

Name

Functional Description

7 - 0

BPLD15

BPLD8

Bipolar Violation Load Word. This bit

pattern is loaded into the most signifi-

cant bits of the bipolar Violation

counter when LDBPV is toggled

(valid in ST-BUS mode only).

Table 47 - Most Significant Bipolar Violation Load

Word (Page 2, Address 1CH)

Bit

Name

Functional Description

7 - 0

BPLD7

BPLD0

Bipolar Violation Load Word. This bit

pattern is loaded into the least signifi-

cant bits of the Bipolar Violation

Counter. These bits are loaded when

LDBPV is toggled.

Table 48 - Least Significant Bipolar Violation Load

Word (Page 2, Address 1DH)

Bit

Name

Functional Description

7 - 0

ECLD7

ECLD0

E-bit Error Counter Load Word. This

bit pattern is loaded into the E-bit

error counter when LDEC is toggled

(valid in ST-BUS mode only).

Table 49 - E-bit Error Counter Load Word

(Page 2, Address 1EH)

Bit

Name

Functional Description

7 - 0

CCLD7

CCLD0

CRC-4 Error Counter Load Word.

This bit pattern is loaded into the

CRC-4 Error Counter when LDCRC

is toggled (valid in ST-BUS mode

only).

Table 50 - CRC-4 Error Counter Load Word

(Page 2, Address 1FH)

Status Page 3

Tables 51 to 58 describe the bit functions of the page

3 status registers.

Bit

Name

Functional Description

SYNC

Receive

Basic

Frame

Alignment.

Indicates the basic frame alignment

status (1 - loss; 0 - acquired).

MFSYNC

Receive Multiframe Alignment. Indi-

cates the multiframe alignment status

(1 - loss; 0 -acquired).

CRCSYN

Receive

CRC-4

Synchronization.

Indicates

the

CRC-4

multiframe

alignment status (1 - loss;

0 -

acquired).

REB1

Receive E-Bit One Status. This bit

indicates the status of the received

E1 bit of the last multiframe.

REB2

Receive E-Bit Two Status. This bit

indicates the status of the received

E2 bit of the last multiframe.

CRCRF

CRC-4 Reframe. A one indicates that

the receive CRC-4 multiframe syn-

chronization

could

not

found

within the time out period of 8 msec.

after detecting basic frame synchro-

nization. This bit is cleared when

CRC-4 synchronization is achieved.

PSYNC

Synchronization Persistence. This bit

will go high when the SYNC status bit

goes high (loss of basic frame align-

ment). It will persist high for eight

msec. after SYNC has returned low,

and then return low.

CRCIWK

CRC-4 Interworking. This bit indi-

cates the CRC-4 interworking status

(1 - CRC-to-CRC;

0 - CRC-to-non-CRC).

Table 51 - Synchronization Status Word

(Page 3, Address 10H)

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