DS3134 datasheet(84/203 Pages) DALLAS

84 / 203 page

DS3134

84 of 203

THCD

0484h

5432

TABTE

TCFCS

TBF

TID

TCRC1

TCRC0

TIFS

TTRANS

n/a

TZSD

TFG3

TFG2

TFG1

TFG0

Note: Bits that are underlined are read only, all other bits are read-write.

Bit 0 / Transmit Transparent Enable (TTRANS). When this bit is set low, the HDLC engine will

generate flags and the FCS (if enabled via TCRC0/1) and perform zero stuffing. When this bit is set high,

the HDLC engine does not generate flags or the FCS and does not perform zero stuffing.

0 = transparent mode disabled

1 = transparent mode enabled

Bit 1 / Transmit Interfill Select (TIFS).

0 = the interfill byte is 7Eh (01111110)

1 = the interfill byte is FFh (11111111)

Bit 2 & Bit 3 / Transmit CRC Selection (TCRC0/TCRC1). These 2 bits are ignored if the HDLC

channel is set into Transparent mode (TTRANS = 1).

TCRC1

TCRC0

Action

no CRC is generated

16-bit CRC (CCITT/ITU Q.921)

32-bit CRC

illegal state

Bit 4 / Transmit Invert Data Enable (TID). When this bit is set low, the outgoing HDLC packets are

not inverted after being generated. When this bit is set high, the HDLC engine inverts all the data (flags,

information fields, and FCS) after the packet has been generated.

0 = do not invert data

1 = invert all data (including flags and FCS)

Bit 5 / Transmit Bit Flip (TBF). When this bit is set low, the HDLC engine will obtain the first HDLC

bit to be transmitted from the lowest bit position of the PCI Bus bytes (i.e. PAD[0] / PAD[8] / PAD[16] /

PAD[24]). When this bit is set high, the HDLC engine will obtain the first HDLC bit to be transmitted

from the highest bit position of the PCI Bus bytes (i.e. PAD[7] / PAD[15] / PAD[23] / PAD[31]).

0 = the first HDLC bit transmitted is obtained from the lowest bit position of the bytes on the

PCI Bus

1 = the first HDLC bit transmitted is obtained from the highest bit position of the bytes on the

PCI Bus

DS3134 Folha de dados(PDF) 84 Page - Dallas Semiconductor

DS3134 Folha de dados(HTML) 84 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

Folha de dados Download

Ligação URL