SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
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 Chapter 32, Initialization, Section 32.2.4, 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 SR1.1, sysboot15 must be tied to vdd, but for SR2.0 it is configurable. For more information, see Section 18.4.6.1.1.1, Permanent PU/PD disabling (SR 2.0 only) in Chapter 18, Control Module.