| Feature | ICD (PIC) | BBW (NXP) | JTAG (generic) | |-----------------------|--------------------|--------------------|--------------------| | Pin count (fixed) | 5 (including power)| 1–2 | 4–5 | | Needs external clock? | Yes (on PGC) | No (target-derived)| Yes (TCK) | | Debug in sleep | Limited | Yes | No (usually) | | Fixed pin location | Yes (same across family) | Yes (BKGD) | No (can be remapped)|

Defines the main reason for the hospital stay and sets the base rate.