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TMS320F280270 Datasheet(PDF) 10 Page - Texas Instruments |
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TMS320F280270 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 119 page TMS320F280270, TMS320F280260 TMS320F280230, TMS320F280220 SPRS810 – APRIL 2012 www.ti.com 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 2-5. Table 2-5. Wait-states 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 via the Flash registers. 1-wait minimum 1-wait is minimum number of wait states allowed. FLASH Programmable Programmed via 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 10 Device Overview Copyright © 2012, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TMS320F280270 TMS320F280260 TMS320F280230 TMS320F280220 |
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