Datasheet

DS21352/DS21552
61 of 137
TC1 TO TC24: TRANSMIT CHANNEL REGISTERS (Address=50 to 57 and 40
to 4F Hex)
(for brevity, only channel one is shown; see Table 5-1 for other register address)
(MSB) (LSB)
C7 C6 C5 C4 C3 C2 C1 C0 TC1 (50)
SYMBOL POSITION NAME AND DESCRIPTION
C7 TC1.7 MSB of the Code (this bit is transmitted first)
C0 TC1.0 LSB of the Code (this bit is transmitted last)
TCC1/TCC2/TCC3: TRANSMIT CHANNEL CONTROL REGISTER (Address=16
to 18 Hex)
(MSB) (LSB)
CH8 CH7 CH6 CH5 CH4 CH3 CH2 CH1 TCC1 (16)
CH16 CH15 CH14 CH13 CH12 CH11 CH10 CH9 TCC2 (17)
CH24 CH23 CH22 CH21 CH20 CH19 CH18 CH17 TCC3 (18)
SYMBOL POSITION NAME AND DESCRIPTION
CH24 TCC3.7
Transmit Channel 24 Code Insertion Control Bit
0=do not insert data from the TC24 register into the transmit data stream
1 = insert data from the TC24 register into the transmit data stream
CH1 TCC1.0
Transmit Channel 1 Code Insertion Control Bit
0=do not insert data from the TC1 register into the transmit data stream
1 = insert data from the TC1 register into the transmit data stream
11.2 RECEIVE SIDE CODE GENERATION
In the receive direction there are also two methods by which channel data to the backplane can be
overwritten with data generated by the framer. The first method which is covered in Section 11.2.1 was a
feature contained in the original DS2151 while the second method which is covered in Section 11.2.2 is a
new feature of the DS2152/352/552.