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TMP320F2802348S Scheda tecnica(PDF) 8 Page - Texas Instruments

Il numero della parte TMP320F2802348S
Spiegazioni elettronici  TMS320x28027, TMS320x28026, TMS320x28025,TMS320x28024, TMS320x28023, TMS320x28022 Piccolo MCU
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Produttore elettronici  TI [Texas Instruments]
Homepage  http://www.ti.com
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Advisory — ADC: Initial Conversion
www.ti.com
Advisory
ADC: Initial Conversion
Revision(s) Affected
0
Details
When the ADC conversions are initiated by any source of trigger, the first sample may
not be the correct conversion result.
Workaround(s)
Discard the first sample at the beginning of every series of conversions. For instance, if
the application calls for a given series of conversions, SOC0
→SOC1→SOC2, to initiate
periodically, then setup the series instead as SOC0
→SOC1→SOC2→SOC3 and only
use the last three conversions, ADCRESULT1, ADCRESULT2, ADCRESULT3, thereby
discarding ADCRESULT0.
Each application should validate this as acceptable in their application.
Advisory
Memory: Prefetching Beyond Valid Memory
Revision(s) Affected
0
Details
The C28x CPU prefetches instructions beyond those currently active in its pipeline. If the
prefetch occurs past the end of valid memory, then the CPU may receive an invalid
opcode.
Workaround
The prefetch queue is 8x16 words in depth. Therefore, code should not come within 8
words of the end of valid memory. This restriction applies to all memory regions and all
memory types (flash, OTP, SARAM) on the device. Prefetching across the boundary
between two valid memory blocks is ok.
Example 1: M1 ends at address 0x7FF and is not followed by another memory block.
Code in M1 should be stored no farther than address 0x7F7. Addresses 0x7F8-0x7FF
should not be used for code.
Example 2: M0 ends at address 0x3FF and valid memory (M1) follows it. Code in M0
can be stored up to and including address 0x3FF. Code can also cross into M1 up to
and including address 0x7F7.
8
TMS320x2802x Piccolo MCU Silicon Errata
SPRZ292 – December 2008
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