Analog Devices HPUSB USB and HPPCI Emulator Users Guide Rev 32
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HPUSB, USB, and HPPCI Emulators User’s Guide 1-7 Getting Started when connected to a session or when the ICE Test utility is used. At all other times, the LED should be off. For custom processor boards still in design, refer to the Engineer-to-Engi- neer Note, Analog Devices JTAG Emulation Technical Reference (EE-68), available from the Analog Devices Web site. This document is a technical reference for implementing the JTAG interface on your target. Now the emulator hardware is ready to be used in conjunction with CCES or VisualDSP++ to debug a processor target system. See “Configurator Software”. Configurator Software CrossCore Embedded Studio and VisualDSP++ development software require a description of your platform (JTAG chain). The platform defini- tion is necessary for the software to communicate with the hardware through the emulator. The VisualDSP++ and CCES include the target configurator utility to configure and test your emulator hardware. The target configurator pro- vides emulator detection, JTAG I/O voltage selection, and JTAG frequency selection. Use the ICE Test (part of the target configurator) to test the target. If any errors are encountered, the errors are reported imme- diately and the test ends. Each error message recommends a solution to the problem. Refer to the online help for information about “target configurator”, “JTAG frequency”, and “ICE test”.
JTAG Frequency Selection 1-8 HPUSB, USB, and HPPCI Emulators User’s Guide JTAG Frequency Selection USB-ICE emulators, high-performance PCI-ICE, and high-performance USB-ICE emulators support a JTAG clock operation up to 50 MHz. Not all frequencies listed above are supported for all processor fam- ilies. The displayed frequencies depend upon the processor family. There is a relationship between the JTAG frequency and core clock fre- quency of the processor. Typically, the core clock runs at a frequency that is more than 2x the JTAG clock’s frequency. On newer Analog Devices processors, the core clock is a variable that sometimes is set by switches or software. If the core/JTAG clock relation is not followed, scan failures can prevent the emulator from connecting to the processor. Use the JTAG Frequency Selection dialog box to test and change the rate at which the JTAG Test Clock signal (TCK) runs. To access the dialog box: CrossCore Embedded Studio users choose Target > Settings > JTAG Frequency Selection after launching a debug configuration. VisualDSP++ users choose Settings > JTAG Frequency Selection after creating a debug session.
HPUSB, USB, and HPPCI Emulators User’s Guide 1-9 Getting Started Figure 1-2 and Figure 1-3 show the JTAG Frequency Selection dialog box. Figure 1-2. HPUSB-ICE JTAG Frequency Selection Dialog Box Figure 1-3. HPPCI-ICE JTAG Frequency Selection Dialog Box
JTAG Frequency Selection 1-10 HPUSB, USB, and HPPCI Emulators User’s Guide The tests listed in the Status box are run when you click Te s t in the JTAG Frequency Selection dialog box. The blue arrow points to the current fre- quency. The arrow does not change after you run the tests because Cancel goes back to using the frequency pointed to by the blue arrow. To use a different frequency, select the appropriate frequency from the list and click Te s t. Click OK to use the frequency that is highlighted and tested already. Table 1-1 describes the JTAG Frequency Selection dialog box. If you encounter a problem launching the CCES or VisualDSP++ at a certain frequency, delete your debug configuration/session and create a new debug configuration/session. This sets TCK back to the default value. Table 1-1. JTAG Frequency Selection Dialog Box Item Description Select frequency (MHz)Selects the frequency to run TCK. StatusUpdates status of the tests indicated within the test group. The test status indicator can show a “running” icon, “not running” icon, “pass” icon, or “fail” icon, depending on the test status. Te s tTests the selected frequency by running the tests in the Status group. NOTE: If tests fail, you may have to shut down the IDE and restart your session. OKSaves the selected frequency. This should only be highlighted if all the tests have passed. CancelContinues using the frequency pointed to by the blue arrow.
HPUSB, USB, and HPPCI Emulators User’s Guide 1-11 Getting Started HPPCI JTAG I/O Voltage Detection The mode of operation supported by the PCI emulator is dependent on the connection method used for the 14-pin JTAG header on your target. Table 1-2 shows how the target JTAG header connects for legacy and auto detection modes. HPUSB/USB Legacy Mode Legacy mode is used for older targets that do not provide a target VDDIO input for automatic voltage detection by the emulator. In this mode, the voltage at which the JTAG signals run is set manually through the Config- urator utility. The configurator utility provides a voltage selection setting when configuring the target. HPUSB-ICE and USB-ICE emulators do not support auto voltage detection mode. Table 1-2. HPPCI JTAG Legacy and Auto Detection Modes HPPCI JTAG I/O -- Legacy Pinout HPPCI JTAG I/O -- Auto Detection Pinout 12 4 56 78 910 11 12 13 14GND Key (no pin)EMU GND TMS TCK TRST TDI TDO GND BTMS BTCK BTRST BTDI 12 4 56 78 910 11 12 13 14GN D Ke y (no pin)EMU NC TMS TCK TRST TDI TDO GN D Target VDDIO / BTMS BTCK BTRST BTDI
HPPCI JTAG I/O Voltage Detection 1-12 HPUSB, USB, and HPPCI Emulators User’s Guide HPPCI-ICE Legacy/Auto Detection Mode The factory default for the pod shown in Figure 1-4 is legacy mode. For more information about available modes, refer to “Auto Detection Mode” on page 1-14. In order to modify the factory default setting, remove the four screws on the bottom of the plastic enclosure. When opening the case, first remove the top of the enclosure with the top facing up. This must be done to ensure that the four light pipes used for the LEDs are not damaged. The default pod setting is shown in Figure 1-5. To determine whether the default setting of your HPPCI-ICE needs to be modified, refer to “Legacy Mode (Factory Default Setting)”. Figure 1-4. HPPCI-ICE Pod
HPUSB, USB, and HPPCI Emulators User’s Guide 1-13 Getting Started Legacy Mode (Factory Default Setting) Legacy mode is used for older targets that do not support voltages less than 3.3V and do not provide an IOVDD input for automatic voltage detection by the pod. Consequently, the emulator in legacy mode is used for all previously designed 3.3V and 5V target boards. The HPPCI-ICE is 3.3V compliant and 5.0V tolerant in this mode and accepts both 3.3V and 5.0V signals but only drives 3.3V CMOS level signals. In legacy mode, the LED labeled 3.3/5V is lit. The emulator is set to Legacy mode before leaving the factory. The switch must be set in the manner shown in Figure 1-6 to verify that the emulator is in legacy mode, or to change the emulator to legacy mode. Figure 1-5. Default Switch Setting for HPPCI-ICE Pod
HPPCI JTAG I/O Voltage Detection 1-14 HPUSB, USB, and HPPCI Emulators User’s Guide Auto Detection Mode Auto detection mode is recommended for all newly designed target boards. This mode supports 1.8V, 2.5V, 3.3V, and 5V target boards. PCI-based emulators are 1.8V, 2.5V, and 3.3V-compliant in auto detection mode. This means that the emulator can accept 1.8V, 2.5V, and 3.3V signals and can also drive the respective 1.8V, 2.5V, and 3.3V CMOS level signals. The emulator is also 5V tolerant. Consequently, the emulator accepts 5V signals and drives 3.3V signals to the target. In auto detection mode, the emulator samples the target VDDIO signal (pin 5 on the JTAG header) and drives the JTAG signals from the emula- tor at the sampled voltage. The respective 1.8V, 2.5V, or 3.3/5V LED also lights up to indicate the voltage at which the JTAG signals are driven. The emulator is set to legacy mode before leaving the factory. The switch must be set in the manner shown in Figure 1-7 to verify that the emulator Figure 1-6. Legacy Switch Setting for HPPCI-ICE Pod
HPUSB, USB, and HPPCI Emulators User’s Guide 1-15 Getting Started is in auto detection mode, or to change the emulator to auto detection mode. Figure 1-7. Auto Detection Switch Setting for HPPCI-ICE Pod
Troubleshooting and Warranty 1-16 HPUSB, USB, and HPPCI Emulators User’s Guide Troubleshooting and Warranty To provide comprehensive troubleshooting advice and warranty information for all emulator and EZ-KIT Lite products, Analog Devices maintains an Engineer-to-Engineer Note. Emulator and EZ-KIT Lite Eval- uation System Troubleshooting Guide (EE-175) is available online at: http://www.analog.com. This EE-Note can be used to resolve most installation, connection, and software issues affecting the use of Analog Devices in-circuit emulators (ICEs) and EZ-KIT Lite evaluation systems, avoiding the need to return the suspected faulty emulator or EZ-KIT Lite board. Please carry out all troubleshooting steps outlined in this document before contacting Analog Devices Processor Tools Support. Also included in the EE-Note, complete warranty and return material authorization (RMA) information for emulators and EZ-KIT Lite prod- ucts. In general, emulators less than one year old are within warranty, and repairs within that period are free of charge, but there are some limitations to this warranty coverage. For details, see the note.