DS2196 datasheet(116/157 Pages) DALLAS

116 / 157 page

DS2196

116 of 157

opening or closing flag (01111110) or an abort signal (11111111). If enabled via CCR2.0, the DS2196

will automatically look for five 1’s in a row, followed by a 0. If it finds such a pattern, it will

automatically remove the zero. If the zero destuffer sees six or more 1’s in a row followed by a 0, the 0 is

not removed. The CCR2.0 bit should always be set to a 1 when the DS2196 is extracting the FDL. More

on how to use the DS2196 in FDL applications in this legacy support mode is covered in a separate

Application Note.

RFDLA: RECEIVE FDL REGISTER from FRAMER A (Address = 28 Hex)

RFDLB: RECEIVE FDL REGISTER from FRAMER B (Address = C8 Hex)

(MSB)

(LSB)

RFDL7

RFDL6

RFDL5

RFDL4

RFDL3

RFDL2

RFDL1

RFDL0

SYMBOL

POSITION

NAME AND DESCRIPTION

RFDL7

RFDL.7

MSB of the Received FDL Code

RFDL0

RFDL.0

LSB of the Received FDL Code

The Receive FDL Register (RFDL) reports the incoming Facility Data Link (FDL) or the incoming Fs

bits. The LSB is received first.

RMTCH1A: RECEIVE FDL MATCH REGISTER 1 FRAMER A

(Address = 29 Hex)

RMTCH2A: RECEIVE FDL MATCH REGISTER 2 FRAMER A

(Address = 2A Hex)

RMTCH1B: RECEIVE FDL MATCH REGISTER 1 FRAMER B

(Address = C9 Hex)

RMTCH2B: RECEIVE FDL MATCH REGISTER 2 FRAMER B

(Address = CA Hex)

(MSB)

(LSB)

RMFDL7

RMFDL6

RMFDL5

RMFDL4

RMFDL3

RMFDL2

RMFDL1

RMFDL0

SYMBOL

POSITION

NAME AND DESCRIPTION

RMFDL7

RMTCH1A.7

RMTCH2A.7

RMTCH1B.7

RMTCH2B.7

MSB of the FDL Match Code

RMFDL0

RMTCH1A.0

RMTCH2A.0

RMTCH1B.0

RMTCH2B.0

LSB of the FDL Match Code

When the byte in the Receive FDL Register matches either of the two Receive Match Registers

(RMTCH1/RMTCH2), SR2.2 will be set to a 1 and the INT will go active if enabled via IMR2.2.

18.2.3 Transmit Section

The transmit section will shift out into the T1 data stream, either the FDL (in the ESF framing mode) or

the Fs bits (in the D4 framing mode) contained in the Transmit FDL register (TFDL). When a new value

DS2196 Datasheet(PDF) 116 Page - Dallas Semiconductor

DS2196 Datasheet(HTML) 116 Page - Dallas Semiconductor

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