PM5366-PI datasheet(166/267 Pages) PMC

166 / 267 page

PRELIMINARY

PM5366 TEMAP-84

DATASHEET

PMC-2010672

ISSUE 1

HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER

AND M13 MULTIPLEXER

PROPRIETARY AND CONFIDENTIAL

154

As alternate formulation, if SSTM[1:0] was converted to its decimal equivalent,

one would have to satisfy the constraint:

(SSTM + 1) mod 4 = Clock Cycles SDC1FP leads LREFCLK

12.3 DS3 Frame Format

The TEMAP-84 provides support for both the C-bit parity and M23 DS3 framing

formats. The DS3 frame format is shown in Figure 13.

Figure 12

- DS3 Frame Structure

X 1

F 1

C 1

F 2

C 2

F 3

F 4

C 3

X 2

F 1

C 1

F 2

C 2

F 3

F 4

C 3

P 1

F 1

C 1

F 2

C 2

F 3

F 4

C 3

P 2

F 1

C 1

F 2

C 2

F 3

F 4

C 3

F 1

C 1

F 2

C 2

F 3

F 4

C 3

F 1

C 1

F 2

C 2

F 3

F 4

C 3

F 1

C 1

F 2

C 2

F 3

F 4

C 3

84 bits

M-subframe 1

M-subframe 7

M-subframe 6

M-subframe 5

M-subframe 4

M-subframe 3

M-subframe 2

Xx: X-Bit Channel

• Transmit: The TEMAP-84 inserts the FERF signal on the X-bits. FERF

generation is controlled by either the FERF bit of the DS3 TRAN

Configuration register or by detection of OOF, RED, LOS and AIS, as

configured by the TEMAP-84 Master DS3 Alarm Enable register.

• Receive: The TEMAP-84 monitors the state and detects changes in the

state of the FERF signal on the X-bits.

Px: P-Bit Channel

• Transmit: The TEMAP-84 calculates the parity for the payload data over

the previous M-frame and inserts it into the P1 and P2 bit positions.

• Receive: The TEMAP-84 calculates the parity for the received payload.

Errors are accumulated in the DS3 PMON Parity Error Event Count

registers.

PM5366-PI Datasheet(PDF) 166 Page - PMC-Sierra, Inc

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