XRT72L13 Datasheet, PDF(240/370 Page) Exar Corporation – M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

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XRT72L13 Datasheet, PDF (240/370 Pages) Exar Corporation – M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

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XRT72L13

M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC

REV. P1.0.6

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PRELIMINARY

FIGURE 59. DS3 FRAME FORMAT FOR C-BIT PARITY

X

I

F1

I AIC I

F0

I

NA

I

F0

I FEAC I

F1

I

I

X

I

F1

I UDL I

F0

I

NA

I

F0

I FEAC I

F1

I

P

I

F1

I

CP

I

F0

I

CP

I

F0

I

CP

I

F1

I

P

I

F1

I FEBE I

F0

I FEBE I

F0

I FEBE I

F1

I

M0

I

F1

I

DL

I

F0

I

DL

I

F0

I

DL

I

F1

I

M1

I

F1

I UDL I

F0

I UDL I

F0

I UDL I

F1

I

M0

I

F1

I UDL I

F0

I UDL I

F0

I UDL I

F1

I

X = Signaling bit for network control

I = Payload Information (84 bit packets)

Fi = Frame synchronization bit with logic value i

P = Parity bit

Mi = Multiframe synchronization bit with logic value i

AIC = Application Identification Channel

NA = reserved for network application

FEAC = Far End Alarm and Control

DL = Data Link

CP = CP (Path)-bit parity

FEBE = Far End Block Error

UDL = User Data Link

FIGURE 60. DS3 FRAME FORMAT FOR M13

X

I

F1

I C11 I

F0

I C12 I

F0

I C13 I

F1

I

I

X

I

F1

I C21 I

F0

I C22 I

F0

I C23 I

F1

I

P

I

F1

I C31 I

F0

I C32 I

F0

I C33 I

F1

I

P

I

F1

I C41 I

F0

I C42 I

F0

I C43 I

F1

I

M0

I

F1

I C51 I

F0

I C52 I

F0

I C53 I

F1

I

M1

I

F1

I C61 I

F0

I C62 I

F0

I C63 I

F1

I

M0

I

F1

I C71 I

F0

I

X = Signaling bit for network control

I = Payload Information (84 bit packets)

Fi = Frame synchronization bit with logic value i

Cij = jth stuff code bit of ith channel

P = Parity bit

C72 I

F0

I C73 I

F1

I

Mi = multiframe synchronization bit with logic values i

The user can choose between these two framing for-

mats, by writing the appropriate data to bit 2 of the

"Operating Mode" Register (Address = 0x00), as de-

picted below.

228

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