DS2152L datasheet(69/94 Pages) DALLAS

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DS2152

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RDNCD: RECEIVE DOWN CODE DEFINITION REGISTER (Address=15 Hex)

(MSB)

(LSB)

SYMBOL

POSITION

NAME AND DESCRIPTION

RDNCD.7

Receive Down Code Definition Bit 7. First bit of the repeating

pattern.

RDNCD.6

Receive Down Code Definition Bit 6. A Don’t Care if a 1-bit

length is selected.

RDNCD.5

Receive Down Code Definition Bit 5. A Don’t Care if a 1 or 2-

bit length is selected.

RDNCD.4

Receive Down Code Definition Bit 4. A Don’t Care if a 1 to 3-

bit length is selected.

RDNCD.3

Receive Down Code Definition Bit 3. A Don’t Care if a 1 to 4-

bit length is selected.

RDNCD.2

Receive Down Code Definition Bit 2. A Don’t Care if a 1 to 5-

bit length is selected.

RDNCD.1

Receive Down Code Definition Bit 1. A Don’t Care if a 1 to 6-

bit length is selected.

RDNCD.0

Receive Down Code Definition Bit 0. A Don’t Care if a 1 to 7-

bit length is selected.

13.0 TRANSMIT TRANSPARENCY

Each of the 24 T1 channels in the transmit direction of the DS2152 can be either forced to be transparent

or, in other words, can be forced to stop Bit 7 Stuffing and/or Robbed Signaling from overwriting the data

in the channels. Transparency can be invoked on a channel by channel basis by properly setting the

TTR1, TTR2, and TTR3 registers.

TTR1/TTR2/TTR3:

TRANSMIT TRANSPARENCY REGISTER (Address=39 to 3B Hex)

(MSB)

(LSB)

CH8

CH7

CH6

CH5

CH4

CH3

CH2

CH1

TTR1 (39)

CH16

CH15

CH14

CH13

CH12

CH11

CH10

CH9

TTR2 (3A)

CH24

CH23

CH22

CH21

CH20

CH19

CH18

CH17

TTR3 (3B)

SYMBOL

POSITION

NAME AND DESCRIPTION

CH24

TTR3.7

Transmit Transparency Registers.

0=this DS0 channel is not transparent

CH1

TTR1.0

1=this DS0 channel is transparent

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