SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
7.3.2.2 Data Shift Register
Figure 7-4 is the register used to shift bits between the ICEPick TDI and TDO. This register is 32 bits wide. The data shift register has multiple shift in points to facilitate shifts on the instruction path and several of the data paths.
Figure 7-4 Data Shift RegisterWhen asked to shift, 1 bit is shifted from each bit into the next lower bit. A new value is shifted in from TDI while the least significant bit is shifted out to TDO. The shift register has several insertion points based on the current TAP state or value in the instruction register.