DS21FT40 datasheet(49/87 Pages) DALLAS

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DS21FT40

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

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

(MSB)

(LSB)

TC1 (60)

SYMBOLS

POSITION

NAME AND DESCRIPTION

TC1.7

MSB of the Code (this bit is transmitted first)

TC1.0

LSB of the Code (this bit is transmitted last)

TCC1/TCC2/TCC3/TCC4: TRANSMIT CHANNEL CONTROL REGISTER

(Address=A0 to A3 Hex)

(MSB)

(LSB)

CH8

CH7

CH6

CH5

CH4

CH3

CH2

CH1

TCC1 (A0)

CH16

CH15

CH14

CH13

CH12

CH11

CH10

CH9

TCC2 (A1)

CH24

CH23

CH22

CH21

CH20

CH19

CH18

CH17

TCC3 (A2)

CH32

CH31

CH30

CH29

CH28

CH27

CH26

CH25

TCC4 (A3)

SYMBOLS

POSITION

NAME AND DESCRIPTION

CH1 - 32

TCC1.0 - 4.7

Transmit Code Insertion Control Bits

0 = do not insert data from the TC register into the transmit

data stream

1 = insert data from the TC register into the transmit data

stream

10.2 RECEIVE SIDE CODE GENERATION

On the receive side, the Receive Channel Control Registers (RCC1/2/3/4) are used to determine which of

the 32 E1 channels off of the E1 line and going to the backplane should be overwritten with the code

placed in the Receive Channel Registers (RC1 to RC32). This method allows a different 8–bit code to be

placed into each of the 32 E1 channels.

RC1 TO RC32: RECEIVE CHANNEL REGISTERS (Address=80 to 9F Hex)

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

(MSB)

(LSB)

RC1 (80)

SYMBOLS

POSITION

NAME AND DESCRIPTION

RC1.7

MSB of the Code (this bit is sent first to the backplane)

RC1.0

LSB of the Code (this bit is sent last to the backplane)

DS21FT40 Datasheet(PDF) 49 Page - Dallas Semiconductor

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