| `variable`* | Name or address of the global variable to trace. | string (in case the address is provided, it must have the prefix `0x`) |
| `variable`* | Name or address of the global variable to trace. | string (in case the address is provided, it must have the prefix `0x`) |
| `mode` | Access mode to trace. Example: `R` (read) means only read accesses to the variable will be logged. If `PC` is appended (`R PC`), the program counter will also be recorded. | possible values: `R` (read), `W` (write), `RW` (read + write), `PC` (program counter)<br/>default: `W` |
| `mode` | Access mode to trace. Example: `R` (read) means only read accesses to the variable will be logged. If `PC` is appended (`R PC`), the program counter will also be recorded. | possible values: `R` (read), `W` (write), `RW` (read + write), `PC` (program counter)<br/>default: `W` |
| `size` | Size of the variable to be traced, in bytes. | integer (accepted values: 1, 2 or 4) |