16.7.2 Boot External Notification I/O Pin Register
| Name: | BOOT_GPIOSEL |
| Offset: | 0x818 |
| Reset: | 0xFFFF_FFFF |
| Property: | R/P |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| FLTSLEWLIM[1:0] | FLTODRAIN | FLTPOL | GPIOPORTSEL[3] | ||||||
| Access | R/P | R/P | R/P | R/P | R/P | ||||
| Reset | 1 | 1 | 1 | 1 | 1 | ||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| GPIOPORTSEL[2:0] | GPIOPINSEL[3:0] | ||||||||
| Access | R/P | R/P | R/P | R/P | R/P | R/P | R/P | ||
| Reset | 1 | 1 | 1 | 1 | 1 | 1 | 1 | ||
Bits 13:12 – FLTSLEWLIM[1:0] Selects Driver Slew Rate Selection for Boot External Notification Signal
| Value | Description |
|---|---|
| 11 | Slew rate control disabled (fast rise/fall time operation) |
| 10 | Slew rate control enabled (4x slower) |
| 01 | Slew rate control enabled (8x slower) |
| 00 | Slew rate control enabled (12x slower) |
Bit 11 – FLTODRAIN Open Drain Control for Boot External Notification Signal
| Value | Description |
|---|---|
| 1 | The selected fault source normal drive |
| 0 | The selected fault source is open drain drive |
Bit 9 – FLTPOL Selects I/O Port for Boot External Notification Signal
| Value | Description |
|---|---|
| 1 | The selected fault source is active-low |
| 0 | The selected fault source is active-high |
Bits 8:5 – GPIOPORTSEL[3:0] Selects I/O Port for Boot External Notification Signal
Boot code verifies the existence of ports and limits programming of these values accordingly.
Any Other Value - Reserved, no Boot External Notification signal used
| Value | Description |
|---|---|
| 0011 | Port D |
| 0010 | Port C |
| 0001 | Port B |
| 0000 | Port A |
Bits 3:0 – GPIOPINSEL[3:0] Selects I/O Port Pin for Boot External Notification Signal
Boot code verifies the existence of ports and limits programming of these values accordingly.
| Value | Description |
|---|---|
| 11111 | Pin 31 |
| ... | |
| 00001 | Pin 1 |
| 00000 | Pin 0 |