BT8376EPF datasheet(167/323 Pages) CONEXANT

167 / 323 page

Bt8370/8375/8376

Fully Integrated T1/E1 Framer and Line Interface

3.8 Receiver Registers

N8370DSE

Conexant

3-49

FRAMED

PRBS Framed—When set, PRBS test pattern bits are not checked during framing bit positions.

In T1 mode, F-bit locations are not searched. In E1 mode, time slot 0 and time slot 16 (if CAS

framing is selected) are not searched. CAS framing is selected by setting RFRAME[3] to 1 in

the Primary Control register [CR0; addr 001]. If FRAMED is disabled, the PRBS pattern

receiver searches all time slots for the test pattern. FRAMED, ZLIMIT, and RPATT establish

the test pattern measurement type as listed in Table 3-11.

ZLIMIT

PRBS 0 Limit—Determines the number of consecutive zeros allowed within the selected

PRBS test pattern. Refer to Table 3-11 for test pattern measurement options.

RPATT[1:0]

PRBS Test Pattern—Selects one of four PRBS test pattern lengths used to measure the

received bit error ratio during out of service testing. Refer to Table 3-11 for test pattern

measurement options. PRBS test patterns used by RPATT [addr 041] and TPATT [addr 076]

are defined in the ITU standards O.151 and O.152 to use either inverted or non-inverted data.

Bt8370/8375/8376 uses the standard data inversion option for the selected PRBS test pattern

unless ZLIMIT is enabled, in which case the test pattern always uses non-inverted data.

Table 3-11. Receive PRBS Test Pattern

FRAMED

ZLIMIT

RPATT

Test Pattern

Inversion

Unframed 211

Unframed 215

Yes

Unframed 220

Unframed 223

Yes

Unframed 211 with 7 0 limit

Unframed 215 with 7 0 limit (non-std)

Unframed 220 with 14 0 limit (QRSS/QRS/QRTS)

Unframed 223 with 14 0 limit (non-std)

Framed 211

Framed 215

Yes

Framed 220

Framed 223

Yes

Framed 211 with 7 0 limit

Framed 215 with 7 0 limit (non-std)

Framed 220 with 14 0 limit (QRSS/QRS/QRTS)

Framed 223 with 14 0 limit (non-std)

BT8376EPF Datasheet(PDF) 167 Page - Synaptics Incorporated.

BT8376EPF Datasheet(HTML) 167 Page - Synaptics Incorporated.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL