TMS320x28027, TMS320x28026, TMS320x28025, TMS320x28024, TMS320x28023, TMS320x28022 Piccolo MCU Silicon Errata Literature Number: SPRZ292 December 2008 2 SPRZ292 – December 2008 Submit Documentation Feedback Contents 1 2 3 4 5 Introduction ........................................................................................................................ Device and Development Tool Support Nomenclature .............................................................. Device Markings .................................................................................................................. Rev 0 Known Design Marginality/Exceptions to Functional Specifications .................................. Documentation Support ........................................................................................................ SPRZ292 – December 2008 Submit Documentation Feedback Table of Contents 5 5 6 7 9 3 www.ti.com List of Figures 1 2 Example of Device Markings ............................................................................................... 6 Example of Device Nomenclature ......................................................................................... 6 List of Tables 1 2 4 Determining Silicon Revision From Lot Trace Code 2802x ............................................................ 6 Advisory List for Rev 0 Silicon ............................................................................................ 7 List of Figures SPRZ292 – December 2008 Submit Documentation Feedback Silicon Errata SPRZ292 – December 2008 TMS320x2802x Piccolo MCU Silicon Errata 1 Introduction This document describes the silicon updates to the functional specifications for the TMS320x2802x microcontrollers (MCUs). The updates are applicable to: • 38-pin Plastic Small Outline Package, DA Suffix • 48-pin Plastic Quad Flatpack, PT Suffix 2 Device and Development Tool Support Nomenclature To designate the stages in the product development cycle, TI assigns prefixes to the part numbers of all [TMS320] DSP devices and support tools. Each TMS320™ DSP commercial family member has one of three prefixes: TMX, TMP, or TMS (e.g., TMS320F28027). Texas Instruments recommends two of three possible prefix designators for its support tools: TMDX and TMDS. These prefixes represent evolutionary stages of product development from engineering prototypes (TMX/TMDX) through fully qualified production devices/tools (TMS/TMDS). TMX Experimental device that is not necessarily representative of the final device's electrical specifications TMP Final silicon die that conforms to the device's electrical specifications but has not completed quality and reliability verification TMS Fully qualified production device Support tool development evolutionary flow: TMDX Development-support product that has not yet completed Texas Instruments internal qualification testing TMDS Fully qualified development-support product TMX and TMP devices and TMDX development-support tools are shipped against the following disclaimer: "Developmental product is intended for internal evaluation purposes." TMS devices and TMDS development-support tools have been characterized fully, and the quality and reliability of the device have been demonstrated fully. TI's standard warranty applies. Predictions show that prototype devices (TMX or TMP) have a greater failure rate than the standard production devices. Texas Instruments recommends that these devices not be used in any production system because their expected end-use failure rate still is undefined. Only qualified production devices are to be used. TI device nomenclature also includes a suffix with the device family name. This suffix indicates the package type (for example, PBK) and temperature range (for example, A). SPRZ292 – December 2008 Submit Documentation Feedback TMS320x2802x Piccolo MCU Silicon Errata 5 Device Markings 3 www.ti.com Device Markings Figure 1 provides an example of the 2802x device markings and defines each of the markings. The device revision can be determined by the symbols marked on the top of the package as shown in Figure 1. Some prototype devices may have markings different from those illustrated. Figure 2 shows an example of the device nomenclature. Figure 1. Example of Device Markings TMS 320 F 28025 PT A PREFIX TMX = experimental device TMP = prototype device TMS = qualified device DEVICE FAMILY 320 = TMS320 MCU Family TEMPERATURE RANGE A = −40°C to 85°C S = −40°C to 125°C PACKAGE TYPE 48-Pin PT Plastic Quad Flatpack 38-Pin DA Plastic Small-outline Package DEVICE 28027 28026 28025 28024 28023 28022 TECHNOLOGY F = Flash Figure 2. Example of Device Nomenclature Table 1. Determining Silicon Revision From Lot Trace Code 2802x SECOND LETTER IN PREFIX OF LOT TRACE CODE Blank (no second letter in prefix) 6 SILICON REVISION REVISION ID (0x0883) Indicates Revision 0 0x0000 TMS320x2802x Piccolo MCU Silicon Errata COMMENTS This silicon revision is available as TMX. SPRZ292 – December 2008 Submit Documentation Feedback www.ti.com 4 Rev 0 Known Design Marginality/Exceptions to Functional Specifications Rev 0 Known Design Marginality/Exceptions to Functional Specifications Table 2. Advisory List for Rev 0 Silicon Title ...................................................................................................................................... Page Advisory ADC: Initial Conversion ....................................................................................................... 8 Advisory Memory: Prefetching Beyond Valid Memory SPRZ292 – December 2008 Submit Documentation Feedback .............................................................................. TMS320x2802x Piccolo MCU Silicon Errata 8 7 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 Submit Documentation Feedback www.ti.com 5 Documentation Support Documentation Support For device-specific data sheets and related documentation, visit the TI web site at: http://www.ti.com. To access documentation on the web site: 1. Go to http://www.ti.com 2. Click on Microcontrollers (MCU) 3. Under the heading C2000™ High Performance 32-bit Controllers, click on the appropriate device family. 4. Click on a device name and then click on the documentation type you prefer. For further information regarding the Piccolo devices, see theTMS320x28027/28026/28025/28024/28023/28022 Piccolo MCU Data Manual (literature number SPRS523). SPRZ292 – December 2008 Submit Documentation Feedback TMS320x2802x Piccolo MCU Silicon Errata 9 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. 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