SPRUHZ7K August 2015 – April 2024 AM5706 , AM5708 , AM5716 , AM5718 , AM5718-HIREL
The PRM receives SYSBOOT[15:0] information from external pins sys_boot[15:0]. They are used to select interfaces or devices for the booting list. For more information, see Initialization, Section 33.2.4, Sysboot Configuration .
Table 3-24 lists the external boot pins, signal names, their direction, the associated modules, description, and reset values of the signals. If the signal is input to the device, the module is the destination module for the signal; if the signal is an output from the device, the module is the source module of the signal.
| Pin | Signal | I/O (1) | PMWF Module | Description | Module Reset Value |
|---|---|---|---|---|---|
| sys_boot0 | SYSBOOT0 | I | PRM | System boot configuration pin 0: Latched at power-on reset (POR) | Z |
| sys_boot1 | SYSBOOT1 | I | PRM | System boot configuration pin 1: Latched at POR | Z |
| sys_boot2 | SYSBOOT2 | I | PRM | System boot configuration pin 2: Latched at POR | Z |
| sys_boot3 | SYSBOOT3 | I | PRM | System boot configuration pin 3: Latched at POR | Z |
| sys_boot4 | SYSBOOT4 | I | PRM | System boot configuration pin 4: Latched at POR | Z |
| sys_boot5 | SYSBOOT5 | I | PRM | System boot configuration pin 5: Latched at POR | Z |
| sys_boot6 | SYSBOOT6 | I | PRM | System boot configuration pin6: Latched at POR | Z |
| sys_boot7 | SYSBOOT7 | I | PRM | System boot configuration pin 7: Latched at POR | Z |
| sys_boot8 | SYSBOOT8 | I | PRM | System boot configuration pin 8: Latched at POR | Z |
| sys_boot9 | SYSBOOT9 | I | PRM | System boot configuration pin 9: Latched at POR | Z |
| sys_boot10 | SYSBOOT10 | I | PRM | System boot configuration pin 10: Latched at POR | Z |
| sys_boot11 | SYSBOOT11 | I | PRM | System boot configuration pin 11: Latched at POR | Z |
| sys_boot12 | SYSBOOT12 | I | PRM | System boot configuration pin12: Latched at POR | Z |
| sys_boot13 | SYSBOOT13 | I | PRM | System boot configuration pin 13: Latched at POR | Z |
| sys_boot14 | SYSBOOT14 | I | PRM | System boot configuration pin 14: Latched at POR | Z |
| sys_boot15 | SYSBOOT15 | I | PRM | System boot configuration pin15: Latched at POR | Z |
For proper device operation, sysboot14 must be tied to vss. For SR1.0, sysboot15 must be tied to vdd, but for SR2.x it is configurable. For more information, see Permanent PU/PD disabling (SR2.x only) in Control Module.
SR1.0 information is valid only for the AM571x family of devices.