Several user lock bits are available to block access to programming through specific programming ports. These lock bits include:
| Lock Function when Active | Description |
|---|---|
| Disable Auto Programming and IAP Services | This lock disables Auto Programming, Auto Update, IAP Services, and Programming Recovery. SPI initialization functionality is not affected. FlashLock/UPK1 unlocking is only available for JTAG and SPI Slave interfaces. |
| Disable JTAG | This lock completely disables the JTAG interface. If the device is part of a serial JTAG chain, the chain is broken. The JTAG pins themselves remain active but the TAP controller does not respond to activity on these pins. |
| Disable SPI Slave | This lock completely disables the SPI slave interface. Any activity on the SPI pins is ignored. |
In the Configure Security Wizard, click Update policy to apply the programming port locks, as shown in the following figure.
Figure 1. Protect Programming Interfaces in the Libero SoC Software
