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TMS320F28023DAS Datasheet(PDF) 85 Page - Texas Instruments |
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TMS320F28023DAS Datasheet(HTML) 85 Page - Texas Instruments |
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85 / 130 page  TRST TMS TDI TDO TCK V DDIO MCU EMU0 EMU1 TRST TMS TDI TDO TCK TCK_RET 13 14 2 1 3 7 11 9 6 inches or less PD GND GND GND GND GND 5 4 6 8 10 12 JTAG Header V DDIO TMS320F28027, TMS320F28026, TMS320F28023, TMS320F28022 TMS320F28021, TMS320F28020, TMS320F280200 www.ti.com SPRS523F – NOVEMBER 2008 – REVISED DECEMBER 2010 6.5 Thermal Design Considerations Based on the end application design and operational profile, the IDD and IDDIO currents could vary. Systems that exceed the recommended maximum power dissipation in the end product may require additional thermal enhancements. Ambient temperature (TA) varies with the end application and product design. The critical factor that affects reliability and functionality is TJ, the junction temperature, not the ambient temperature. Hence, care should be taken to keep TJ within the specified limits. Tcase should be measured to estimate the operating junction temperature TJ. Tcase is normally measured at the center of the package top-side surface. The thermal application reports IC Package Thermal Metrics (literature number SPRA953) and Reliability Data for TMS320LF24xx and TMS320F28xx Devices (literature number SPRA963) help to understand the thermal metrics and definitions. 6.6 Emulator Connection Without Signal Buffering for the MCU Figure 6-3 shows the connection between the MCU and JTAG header for a single-processor configuration. If the distance between the JTAG header and the MCU is greater than 6 inches, the emulation signals must be buffered. If the distance is less than 6 inches, buffering is typically not needed. Figure 6-3 shows the simpler, no-buffering situation. For the pullup/pulldown resistor values, see Section 2.2, Signal Descriptions. A. See Figure 4-11 for JTAG/GPIO multiplexing. Figure 6-3. Emulator Connection Without Signal Buffering for the MCU NOTE The 2802x devices do not have EMU0/EMU1 pins. For designs that have a JTAG Header on-board, the EMU0/EMU1 pins on the header must be tied to VDDIO through a 4.7-kΩ (typical) resistor. Copyright © 2008–2010, Texas Instruments Incorporated Electrical Specifications 85 Submit Documentation Feedback Product Folder Link(s): TMS320F28027 TMS320F28026 TMS320F28023 TMS320F28022 TMS320F28021 TMS320F28020 TMS320F280200 |
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