JAJSGS4P November 2008 – February 2021 TMS320F28020 , TMS320F280200 , TMS320F28021 , TMS320F28022 , TMS320F28023 , TMS320F28023-Q1 , TMS320F28026 , TMS320F28026-Q1 , TMS320F28026F , TMS320F28027 , TMS320F28027-Q1 , TMS320F28027F , TMS320F28027F-Q1
PRODUCTION DATA
In Figure 9-1, Figure 9-2, Figure 9-3, Figure 9-4, and Figure 9-5, the following apply:
ADDRESS RANGE | PROGRAM AND DATA SPACE |
---|---|
0x3F 0000 to 0x3F 1FFF | Sector D (8K × 16) |
0x3F 2000 to 0x3F 3FFF | Sector C (8K × 16) |
0x3F 4000 to 0x3F 5FFF | Sector B (8K × 16) |
0x3F 6000 to 0x3F 7F7F | Sector A (8K × 16) |
0x3F 7F80 to 0x3F 7FF5 | Program to 0x0000 when using the Code Security Module |
0x3F 7FF6 to 0x3F 7FF7 | Boot-to-Flash Entry Point (program branch instruction here) |
0x3F 7FF8 to 0x3F 7FFF | Security
Password (128-Bit) (Do not program to all zeros) |
ADDRESS RANGE | PROGRAM AND DATA SPACE |
---|---|
0x3F 4000 to 0x3F 4FFF | Sector D (4K × 16) |
0x3F 5000 to 0x3F 5FFF | Sector C (4K × 16) |
0x3F 6000 to 0x3F 6FFF | Sector B (4K × 16) |
0x3F 7000 to 0x3F 7F7F | Sector A (4K × 16) |
0x3F 7F80 to 0x3F 7FF5 | Program to 0x0000 when using the Code Security Module |
0x3F 7FF6 to 0x3F 7FF7 | Boot-to-Flash Entry Point (program branch instruction here) |
0x3F 7FF8 to 0x3F 7FFF | Security Password (128-Bit) (Do not program to all zeros) |
ADDRESS RANGE | PROGRAM AND DATA SPACE |
---|---|
0x3F 6000 to 0x3F 6FFF | Sector B (4K × 16) |
0x3F 7000 to 0x3F 7F7F | Sector A (4K × 16) |
0x3F 7F80 to 0x3F 7FF5 | Program to 0x0000 when using the Code Security Module |
0x3F 7FF6 to 0x3F 7FF7 | Boot-to-Flash Entry Point (program branch instruction here) |
0x3F 7FF8 to 0x3F 7FFF | Security Password (128-Bit) (Do not program to all zeros) |
Table 9-6 shows how to handle these memory locations.
ADDRESS | FLASH | |
---|---|---|
CODE SECURITY ENABLED | CODE SECURITY DISABLED | |
0x3F 7F80 to 0x3F 7FEF | Fill with 0x0000 | Application code and data |
0x3F 7FF0 to 0x3F 7FF5 | Reserved for data only |
Peripheral Frame 1 and Peripheral Frame 2 are grouped together to enable these blocks to be write/read peripheral block protected. The protected mode makes sure that all accesses to these blocks happen as written. Because of the pipeline, a write immediately followed by a read to different memory locations, will appear in reverse order on the memory bus of the CPU. This can cause problems in certain peripheral applications where the user expected the write to occur first (as written). The CPU supports a block protection mode where a region of memory can be protected so that operations occur as written (the penalty is extra cycles are added to align the operations). This mode is programmable and by default, it protects the selected zones.
The wait states for the various spaces in the memory map area are listed in Table 9-7.
AREA | WAIT STATES (CPU) | COMMENTS |
---|---|---|
M0 and M1 SARAMs | 0-wait | Fixed |
Peripheral Frame 0 | 0-wait | |
Peripheral Frame 1 | 0-wait (writes) | Cycles can be extended by peripheral generated ready. |
2-wait (reads) | Back-to-back write operations to Peripheral Frame 1 registers will incur a 1-cycle stall (1-cycle delay). | |
Peripheral Frame 2 | 0-wait (writes) | Fixed. Cycles cannot be extended by the peripheral. |
2-wait (reads) | ||
L0 SARAM | 0-wait data and program | Assumes no CPU conflicts |
OTP | Programmable | Programmed through the Flash registers. |
1-wait minimum | 1-wait is minimum number of wait states allowed. | |
FLASH | Programmable | Programmed through the Flash registers. |
0-wait Paged min | ||
1-wait Random min Random ≥ Paged | ||
FLASH Password | 16-wait fixed | Wait states of password locations are fixed. |
Boot-ROM | 0-wait |