DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
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 4-1 for other register address.)
(MSB)
(LSB)
C7
C6
C5
C4
C3
C2
C1
C0
RC1 (80)
SYMBOL POSITION
NAME AND DESCRIPTION
C7
C0
RC1.7
RC1.0
MSB of the Code (this bit is sent first to the backplane)
LSB of the Code (this bit is sent last to the backplane)
RCC1/RCC2/RCC3/RCC4: RECEIVE CHANNEL CONTROL REGISTER
(Address = A4 to A7 Hex)
(MSB)
CH8
CH16
CH24
CH32
(LSB)
CH7
CH15
CH23
CH31
CH6
CH14
CH22
CH30
CH5
CH13
CH21
CH29
CH4
CH12
CH20
CH28
CH3
CH11
CH19
CH27
CH2
CH10
CH18
CH26
CH1
CH9
RCC1 (A4)
RCC2 (A5)
RCC3 (A6)
RCC4 (A7)
CH17
CH25
SYMBOL
POSITION
NAME AND DESCRIPTION
Receive Channel Code Insertion Control Bits
CH1 to
CH32
RCC1.0 to
RCC4.7
0 = do not insert data from the RC1 register into the receive data stream
1 = insert data from the RC1 register into the receive data stream
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
