SPRS357D August 2006 – June 2020 TMS320F28044
PRODUCTION DATA.
デバイスごとのパッケージ図は、PDF版データシートをご参照ください。
ADDRESS RANGE | PROGRAM AND DATA SPACE |
---|---|
0x3E 8000 – 0x3E BFFF | Sector D (16K x 16) |
0x3E C000 – 0x3E FFFF | Sector C (16K x 16) |
0x3F 0000 – 0x3F 3FFF | Sector B (16K x 16) |
0x3F 4000 – 0x3F 7F7F | Sector A (16K x 16) |
0x3F 7F80 – 0x3F 7FF5 | Program to 0x0000 when using the
Code Security Module |
0x3F 7FF6 – 0x3F 7FF7 | Boot-to-Flash Entry Point
(program branch instruction here) |
0x3F 7FF8 – 0x3F 7FFF | Security Password (128-Bit)
(Do not program to all zeros) |
NOTE
Table 6-14 shows how to handle these memory locations.
ADDRESS | FLASH | |
---|---|---|
Code security enabled | Code security disabled | |
0x3F 7F80 – 0x3F 7FEF | Fill with 0x0000 | Application code and data |
0x3F 7FF0 – 0x3F 7FF5 | Reserved for data only | |
0x3D 7BFC – 0x3D 7BFF | Application code and data |
Peripheral Frame 1 and Peripheral Frame 2 are grouped together so as to enable these blocks to be write/read peripheral block protected. The protected mode ensures that all accesses to these blocks happen as written. Because of the C28x 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 C28x CPU supports a block protection mode where a region of memory can be protected so as to make sure that operations occur as written (the penalty is extra cycles are added to align the operations). This mode is programmable and by default, it will protect the selected zones.
The wait-states for the various spaces in the memory map area are listed in Table 6-15.
AREA | WAIT-STATES | COMMENTS |
---|---|---|
M0 and M1 SARAMs | 0-wait | Fixed |
Peripheral Frame 0 | 0-wait | Fixed |
Peripheral Frame 1 | 0-wait (writes)
2-wait (reads) |
Fixed. Consecutive (back-to-back) writes to Peripheral Frame 1 registers will experience a 1-cycle pipeline hit (1-cycle delay). |
Peripheral Frame 2 | 0-wait (writes)
2-wait (reads) |
Fixed |
L0 and L1 SARAMs | 0-wait | |
OTP | Programmable,
1-wait minimum |
Programmed via the Flash registers. 1-wait-state operation is possible at a reduced CPU frequency. See Section 6.1.5 for more information. |
Flash | Programmable,
0-wait minimum |
Programmed via the Flash registers. 0-wait-state operation is possible at reduced CPU frequency. The CSM password locations are hardwired for 16 wait-states. See Section 6.1.5 for more information. |
Boot-ROM | 1-wait | Fixed |