ZHCSEF7G December 2014 – February 2019 TPS659037
PRODUCTION DATA.
Table 5-14 lists the boot pins associated configurations.
NOTE
Generally two of the three power sequence definitions are small modifications from the main sequence to the respective OTP memory size.
BOOT0 | BOOT1 | OTP CONFIGURATION | POWER SEQUENCE SELECTOR |
---|---|---|---|
0 | 0 | Set_0 | Sel_0 |
0 | 1 | Set_0 | Sel_1 |
1 | 0 | Set_1 | Sel_2 |
1 | 1 | Set_1 | Sel_2 |
The BOOT0 and BOOT1 pins must be grounded or pulled up, but the pins must not be unconnected (high impedance).
The BOOT0 pin is used to select between two different OTP sets (Set_0 and Set_1) of device configuration (referred to as selectable platform settings in Figure 5-24). For list of OTP programmable parameters with programmed values refer to the Application Note of the relevant part number.
NOTE
The respective VSEL[6:0] bit field in the SMPSn_VOLTAGE and SMPSn_FORCE registers is mapped on a same OTP memory location, meaning that they are loaded at reset with the same value and that the BOOT0 pin changes the setting for both of them.
The BOOT0 pin can also be used with the BOOT1 pin as static selectors during execution of the power sequence. This is intended to provide a possibility from within a static power sequence, to branch to different instructions. This allows choosing power sequences (or subpart of power sequences) based on BOOT pins without altering power sequences themselves in OTP.