SPRACS4 June   2020 TMS320F2800132 , TMS320F2800133 , TMS320F2800135 , TMS320F2800137 , TMS320F2800152-Q1 , TMS320F2800153-Q1 , TMS320F2800154-Q1 , TMS320F2800155 , TMS320F2800155-Q1 , TMS320F2800156-Q1 , TMS320F2800157 , TMS320F2800157-Q1 , TMS320F28384D , TMS320F28384D-Q1 , TMS320F28384S , TMS320F28384S-Q1 , TMS320F28386D , TMS320F28386D-Q1 , TMS320F28386S , TMS320F28386S-Q1 , TMS320F28388D , TMS320F28388S , TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1

 

  1.   Enhancing Device Security by Using JTAGLOCK Feature
    1.     Trademarks
    2. 1 Security Feature on C2000 Device
    3. 2 JTAGLOCK Feature
      1. 2.1 Z1OTP_JLM_ENABLE
      2. 2.2 JTAG Password
        1. 2.2.1 Z1OTP_JTAGPSWDHx
        2. 2.2.2 Z1OTP_JTAGPSWDLx
    4. 3 Enabling JTAGLOCK
      1. 3.1 CCS Flash Plug-in GUI
      2. 3.2 Security Configuration Embedded in .out File
    5. 4 Disabling JTAGLOCK
      1. 4.1 Target Configuration (.ccxml) File
    6. 5 Permanent JTAGLOCK
    7. 6 References

2.1 Z1OTP_JLM_ENABLE

This is a 32-bit value in Zone1 USER OTP of CPU1 at address location 0x78006. The default value of this location is 0xffff000f. 4 bits (LSB) of this 32-bit value maps to JLM (JTAG LOCK Module) enable. To enable the JTAGLOCK feature, you must change this 4-bit value from 0xF (default value) to any other value.

Table 2. Z1OTP_JLM_ENABLE

Z1OTP_JLM_ENABLE JTAGLOCK Feature
0xffff000f (default) JTAGLOCK Disable
0xffff000e JTAGLOCK Enable
0xffff000d JTAGLOCK Enable
- - - - - - - JTAGLOCK Enable
0xffff0000 JTAGLOCK Enable
0x00000000 JTAGLOCK Enable