Datasheet

DS21354/DS21554 3.3V/5V E1 Single-Chip Transceivers
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TCBR1/TCBR2/TCBR3/TCBR4: DEFINITION WHEN CCR3.6 = 1
(MSB) (LSB)
CH18 CH3 CH17 CH2 CH16 CH1 1* 1* TCBR1(22)
CH22 CH7 CH21 CH6 CH20 CH5 CH19 CH4 TCBR2(23)
CH26 CH11 CH25 CH10 CH24 CH9 CH23 CH8 TCBR3(24)
CH30 CH15 CH29 CH14 CH28 CH13 CH27 CH12 TCBR4(25)
*These bits should be set to one to allow the internal TS1 register to create the CAS Multiframe Alignment Word and Spare/Remote Alarm bits.