DS2152L datasheet(51/94 Pages) DALLAS

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DS2152

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pattern. The RCR2.7 bit will determine which code is used. The digital milliwatt code is an 8-byte

repeating pattern that represents a 1 kHz sine wave (1E/0B/0B/1E/9E/8B/8B/9E). Each bit in the RMRs

represents a particular channel. If a bit is set to a 1, then the receive data in that channel will be replaced

with one of the two codes. If a bit is set to 0, no replacement occurs.

RMR1/RMR2/RMR3: RECEIVE MARK REGISTERS (Address=2D to 2F Hex)

(MSB)

(LSB)

CH8

CH7

CH6

CH5

CH4

CH3

CH2

CH1

RMR1(2D)

CH16

CH15

CH14

CH13

CH12

CH11

CH10

CH9

RMR2(2E)

CH24

CH23

CH22

CH21

CH20

CH19

CH18

CH17

RMR3(2F)

SYMBOL

POSITION

NAME AND DESCRIPTION

CH24

RMR3.7

Receive MARK Registers.

0=do not affect the receive data associated with this channel

CH1

RMR1.0

1=replace the receive data associated with this channel with

either the idle code or the digital milliwatt code (depends on the

RCR2.7 bit)

8.2.2 Per-Channel Code Insertion

The second method involves using the Receive Channel Control Registers (RCC1/2/3) to determine

which of the 24 T1 channels off of the T1 line and going to the backplane should be overwritten with the

code placed in the Receive Channel Registers (RC1 to RC24). This method is more flexible than the first

in that it allows a different 8-bit code to be placed into each of the 24 T1 channels.

RC1 TO RC24:

RECEIVE CHANNEL REGISTERS (Address=58 to 5F and 80 to 8F Hex)

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

(MSB)

(LSB)

RC1 (58)

SYMBOL

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)

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