DS2154 datasheet(52/87 Pages) DALLAS

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DS2154

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TIR1/TIR2/TIR3/TIR4: TRANSMIT IDLE REGISTERS (Address=26 to 29 Hex)

[Also used for Per-Channel Loopback]

(MSB)

(LSB)

CH8

CH7

CH6

CH5

CH4

CH3

CH2

CH1

TIR1 (26)

CH16

CH15

CH14

CH13

CH12

CH11

CH10

CH9

TIR2 (27)

CH24

CH23

CH22

CH21

CH20

CH19

CH18

CH17

TIR3 (28)

CH32

CH31

CH30

CH29

CH28

CH27

CH26

CH25

TIR4 (29)

SYMBOL

POSITION

NAME AND DESCRIPTION

CH32

TIR4.7

Transmit Idle Registers.

0=do not insert the Idle Code in the TIDR into this channel

CH1

TIR1.0

1=insert the Idle Code in the TIDR into this channel

NOTE:

If CCR3.5=1, then a 0 in the TIRs implies that channel data is to be sourced from TSER and a 1 implies

that channel data is to be sourced from the output of the receive side framer (i.e., Per-Channel Loopback;

see Figure 1-1).

TIDR: TRANSMIT IDLE DEFINITION REGISTER (Address=2A Hex)

(MSB)

(LSB)

TIDR7

TIDR6

TIDR5

TIDR4

TIDR3

TIDR2

TIDR1

TIDR0

SYMBOL

POSITION

NAME AND DESCRIPTION

TIDR7

TIDR.7

MSB of the Idle Code (this bit is transmitted first)

TIDR0

TIDR.0

LSB of the Idle Code (this bit is transmitted last)

8.1.2 Per-Channel Code Insertion

The second method involves using the Transmit Channel Control Registers (TCC1/2/3/4) to determine

which of the 32 E1 channels should be overwritten with the code placed in the Transmit Channel

Registers (TC1 to TC32). This method is more flexible than the first in that it allows a different 8-bit code

to be placed into each of the 32 E1 channels.

TC1 TO TC32: TRANSMIT CHANNEL REGISTERS (Address=60 to 7F Hex)

(for brevity, only channel 1 is shown; see Table 1-3 for other register address)

(MSB)

(LSB)

SYMBOL

POSITION

NAME AND DESCRIPTION

TC1.7

MSB of the Code (this bit is transmitted first)

DS2154 Datasheet(PDF) 52 Page - Dallas Semiconductor

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