SPRUJ53B April 2024 – September 2024 TMS320F28P550SJ , TMS320F28P559SJ-Q1
Two separate OTP locations determine if MPOST (Memory Power On Self Test) runs after a Power on Reset (POR) event. The first is the Z1/Z2 GPREG2 that is part of the Z1/Z2 OTP. The second is the Z1/Z2 DIAG location that is part of the Zone Select Block of the OTP. While both locations are in the OTP, and are write once only, the DIAG register is duplicated along with the other locations if the Link-Pointer is incremented.
Table 4-15 explains how the bit field values from the user configurable DCSM OTP location, Z1-OTP-BOOT-GPREG2 or Z2-OTP-BOOT-GPREG2, are decoded by boot ROM.
Table 4-16 explains how the bit field values from the user configurable DCSM OTP location, Z1-DIAG or Z2-DIAG, are decoded by the boot ROM.
Bit | Name | Description | Boot ROM Action |
---|---|---|---|
31:6 | Reserved | Reserved | No Action |
5:4 | MPOST_EN | 0x0 - Disable MPOST | Value of 1 along with correct value in GPREG2 allows MPOST to run after POR event. All other values disable MPOST. |
0x1 - Enable MPOST | |||
0x2 - Disable MPOST | |||
0x3 - Disable MPOST | |||
3:0 | Reserved | Reserved | No Action |