| Register Name | Purpose | CRn | CRm |
| (a) | |||
| TX Register (TX) | Communication with JTAG debugger. | 8 | 0 |
| RX Register (RX) | Communication with JTAG debugger. | 9 | 0 |
| Debug Control & Status Register (DCSR) | Flags for enabling debug mode. | 10 | 0 |
| Trace Buffer Register (TBREG) | Reading from trace buffer. | 11 | 0 |
| Checkpoint Register 0 (CHKPTO) | Reference address for use with trace buffer. | 12 | 0 |
| Checkpoint Register 1 (CHKPT1) | Reference address for use with trace buffer. | 13 | 0 |
| TXRX Control Register (TXRXCTRL) | Communication with JTAG debugger. | 14 | 0 |
| (b) | |||
| Process ID (PID) | Remapping current process addresses to slot 0. | 13 | 0 |
| Instruction breakpoint register 0 (IBCR0) | Address of instruction breakpoint 0. | 14 | 8 |
| Instruction breakpoint register 1 (IBCR1) | Address of instruction breakpoint 1. | 14 | 9 |
| Data breakpoint register 0 (DBR0) | Address of data breakpoint 0. | 14 | 0 |
| Data breakpoint register 1 (DBR1) | Address of data breakpoint 1. | 14 | 3 |
| Data Breakpoint Control Register (DBCON) | Configures data breakpoints. | 14 | 4 |
Table 1: XScale debug registers and PID: (a) CP14 registers; (b) CP15 registers.
