Plugging the Emulator into Target Systems
This chapter shows you how to:
• Step 1. Turn OFF power
• Step 2. Unplug probe from demo target system
• Step 3. Set up the probe for the clock source
• Step 4. Plug the probe into the target system
• Step 5. Connect the flying leads to the target system
• Step 6. Turn ON power
CAUTION Possible Damage to the Emulator Probe. The emulation probe contains devices that are susceptible to damage by static discharge. Therefore, precautionary measures should be taken before handling the microprocessor connector attached to the end of the probe cable to avoid damaging the internal components of the probe by static electricity.
We STRONGLY suggest using a ground strap when handling the emulator probe. A ground strap is provided with the emulator.
Step 1. Turn OFF power
CAUTION Possible Damage to the Emulator. Make sure target system power is OFF and make sure HP 64700 power is OFF before removing or installing the emulator probe into the target system.
Do not turn OFF power to the HP 64700 while the emulator is plugged into a target system whose power is ON.
1 If the emulator is currently plugged into a different target system, turn OFF power to that target system.
2 Turn OFF power to the emulator.
Chapter 3: Plugging the Emulator into Target Systems Step 1. Turn OFF power
Step 2. Unplug the probe from the demo target system
• If the emulator is currently connected to a different target system, unplug the emulator probe; otherwise, disconnect the emulator probe from the demo target system.
Chapter 3: Plugging the Emulator into Target Systems Step 2. Unplug the probe from the demo target system
Step 3. Set up the probe for the clock source
A 14-pin DIP socket located at the target connector end of the probe is used to prepare the emulator probe for the type of clock source in the target system. The figure below shows the connections that are made to the socket.
A jumper that connects the emulation processor OSCOUT and CLKIN pins to the OSCOUT and CLKIN pins on the target connector is provided. You can use this jumper if:
• The target system drives CLKIN with an oscillator.
• The target system has a low frequency crystal connected between the OSCOUT and CLKIN pins.
However, if the target system has a high frequency crystal connected between the OSCOUT and CLKIN pins, you may have to replace the jumper
Chapter 3: Plugging the Emulator into Target Systems Step 3. Set up the probe for the clock source
Parasitic circuit parameters in the emulator/target interconnect may cause problems when the target system uses a high frequency crystal. The frequency limit is very much dependent on the target system. Under
favorable conditions, operation at full speed may be possible with the jumper.
If you can use the provided jumper, go on to Step 4; otherwise, perform the following steps.
1 Remove plastic rivets that secure the plastic cover on the top of the emulator probe, and remove the cover.
2 Replace the jumper with either a standard 14-pin oscillator of the desired frequency or a prototyping socket on which a crystal and any capacitors or tank circuitry are assembled.
3 Before you replace the plastic cover, make sure any flying leads that will be used are connected to the probe.
You may want to use the LBG signal, which is active when the emulator is executing in the background monitor, to disable circuitry that checks for processor execution. You may want to use the LRES signal to probe a target system that has a processor soldered-in.
CAUTION Damage to the Emulator Probe Will Result if the Flying Leads are Incorrectly Installed. When connecting the flying leads to the emulator probe, make sure that the ground pin on the output line (labeled with a white dot) is matched with the ground receptacle in the emulator probe.
4 Replace the plastic cover, and insert new plastic rivets (supplied with the emulator) to secure the cover.
Chapter 3: Plugging the Emulator into Target Systems Step 3. Set up the probe for the clock source
Step 4. Plug the probe into the target system
• Install the emulator probe into the target system socket. Make sure that pin 1 of the connector aligns with pin 1 of the socket. Damage to the emulator will result if the probe is incorrectly installed.
You can also use the supplied PGA to PLCC adapter or other QFP or PQFP adapters. Always make sure that pin 1 and other pins of the adapters and connectors are properly aligned; otherwise, damage to the emulator will result.
Chapter 3: Plugging the Emulator into Target Systems Step 4. Plug the probe into the target system
Step 5. Connect the flying leads to the target system
• If your target system checks for processor execution (for example, it has a watchdog timer) you can use the LBG auxiliary output to signal the target system when the emulator is executing in the background monitor. The LBG signal is low when the emulator is running in the background monitor and high in the normal foreground mode.
• If you want to probe a target system with a soldered-in processor Chapter 3: Plugging the Emulator into Target Systems
Step 5. Connect the flying leads to the target system
as shown, or to a target system open drain/collector output driving RESIN.
The emulator does not provide any pullup on the LRES flying lead signal.
Chapter 3: Plugging the Emulator into Target Systems Step 5. Connect the flying leads to the target system
Step 6. Turn ON power
1 Turn ON power to the emulator.
2 Turn ON power to the target system.
Chapter 3: Plugging the Emulator into Target Systems Step 6. Turn ON power