TMS320C6203B

FIXED POINT DIGITAL SIGNAL PROCESSOR

SPRS086K – JANUARY 1999 – REVISED APRIL 2003

IEEE 1149.1 JTAG compatibility statement

For compatibility with IEEE 1149.1 JTAG programmers, the TRST pin may need to be externally pulled up via a 1-kΩ resistor. For these C62x devices, this pin is internally pulled down, holding the JTAG port in reset by default. This is typically only a problem in systems where the DSP shares a scan chain with some other device. Some JTAG programmers for these other devices do not actively drive TRST high, leaving the scan chain inoperable while the C62x JTAG port is held in reset. TI emulators do drive TRST high, so the external pullup resistor is not needed in systems where TI emulators are the only devices that control JTAG scan chains on which the DSP(s) reside. If the system has other devices in the same scan chain as the DSP, and the programmer for these devices does not drive TRST high, then an external 1-kΩ pullup resistor is required.

With this external 1-kΩ pullup resistor installed, care must be taken to keep the DSP in a usable state under all circumstances. When TRST is pulled up, the JTAG driver must maintain the TMS signal high for 5 TCLK cycles, forcing the DSP(s) into the test logic reset (TLR) state. From the TLR state, the DSP’s data scan path can be put in bypass (scan all 1s into the IR) to scan the other devices. The TLR state also allows normal operation of the DSP. If operation without anything driving the JTAG port is desired, the pullup resistor should be jumpered so that it may be engaged for programming the other devices and disconneted for running without a JTAG programmer or emulator.

TMS320C6203B

FIXED POINT DIGITAL SIGNAL PROCESSOR

SPRS086K – JANUARY 1999 – REVISED APRIL 2003

absolute maximum ratings over operating case temperature ranges (unless otherwise noted)†

Supply voltage range, CVDD (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.3 V to 1.8 V Supply voltage range, DVDD (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 4 V Input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 4 V

Output voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 4 V

Operating case temperature ranges, TC:(default) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0_C to 90_C (A version): C6203BGNZA-250 . . . . . . . . . . . . . . . –40_C to105_C

Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65_C to 150_C Temperature cycle range, (1000-cycle performance) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40_C to 125_C

†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltage values are with respect to VSS.

recommended operating conditions

‡Supply voltage, Core for the C6203B 1.7 V devices which are identified in the orderable part number with a “17” following the device number and the package type identifiers.

electrical characteristics over recommended ranges of supply voltage and operating case temperature (unless otherwise noted)

§ TMS and TDI are not included due to internal pullups. TRST is not included due to internal pulldown.

¶Measured with average activity (50% high / 50% low power). For more details on CPU, peripheral, and I/O activity, see the TMS320C6000 Power Consumption Summary application report (literature number SPRA486).