17.7.1 Fuse Bit Mapping
One 32-bit word is reserved for boot configuration.
512 fuse bits are available for customer needs.
Writing a ‘1’ to SFR_SECURE.FUSE disables access to the Secure Fuse Controller (SFC).
To avoid any malfunctioning, the user must not write the “DO NOT USE (DNU)” fuse bits in the Boot Configuration area.
| SFC_DR | Bits | Use | ||
|---|---|---|---|---|
| 16 | [543:512] | JTAG_DIS[543] | SEC_DEBUG_DIS[542] | Boot Configuration bits[541:512](1) |
| 15 | [511:480] | USER_DATA[511:0] | ||
| 14 | [479:448] | |||
| 13 | [447:416] | |||
| 12 | [415:384] | |||
| 11 | [383:352] | |||
| 10 | [351:320] | |||
| 9 | [319:288] | |||
| 8 | [287:256] | |||
| 7 | [255:224] | |||
| 6 | [223:192] | |||
| 5 | [191:160] | |||
| 4 | [159:128] | |||
| 3 | [127:96] | |||
| 2 | [95:64] | |||
| 1 | [63:32] | |||
| 0 | [31:0] | |||
Note: See section Boot Configuration
Word for details on the contents of these bits.
| JTAG Disable (Fuse bit 543) | Secure Debug Disable (Fuse bit 542) | Description |
|---|---|---|
| 0 | 0 | Full JTAG debug allowed in Secure and Normal modes |
| 0 | 1 | JTAG debug allowed in Normal mode only (not in Secure mode) |
| 1 | X | JTAG debug disabled |