ER3-256 TechTools, ER3-256 Datasheet - Page 9

• Manufacturer Part Number: ER3-256
• Description: EMULATOR EPROM ECONOROM III 256K
• Manufacturer: TechTools
• Series: EconoROM™ IIIr
• Type: Memoryr

Specifications of ER3-256

• Contents: ER3 EconoROM III Emulator, Cables (Daisy-chain, LPT and Target) and more
• For Use With/related Products: EPROMs
• For Use With: CBL08-25 - 25 FT DOWNLOAD CABLE UPGRADEC32D-6 - 6" TARGET CABLE IDC TO 32PIN DIPC28D-6 - 6" TARGET CABLE IDC TO 28PIN DIPPS-RT1 - EXTERNAL PWR SUPPLY
• Other names: Q1046463

Apply Power
The emulator can be powered from the target or via an optional external power supply. If your target
operates at 5Volts and can supply the extra emulator current (100ma typical/200ma max) to the memory
socket, then you can use target power. If your target operates at less than 5V or is incapable of supply the
extra emulator current, then you must use an external power supply. External power supplies are available
from TechTools or your local dealer. The external supply must provide a regulated 5VDC at 300ma or
greater.
The emulator status LED operates differently based on whether you are using target power or external
power.
Using Target Power
Turn on your target power supply. The emulator status LED should glow a STEADY GREEN. If not, refer
to the troubleshooting tips below to correct the problem before continuing.
LED does not turn on:
Your target does not have enough power to operate the emulator or power is not reaching the emulator.
LED GLOWS RED:
Your target does not have enough power to operate the emulator or is supplying less than 4.5V.
LED Flashes GREEN:
You have enough power, but you failed to connect the reset line properly. When the emulator is first
powered up, it asserts RESET to keep the target from running until it has received a download. The
flashing GREEN LED indicates target activity.
EconoROM III User’s Manual
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Verify all target cable connections
Verify the target cable is plugged in correctly (pin 1 orientation)
Verify that any adapters you might be using are the correct pin-outs.
Once you are SURE the emulator is not being subjected to reverse voltage, verify the target
provides at least 4.5V to the memory socket WHILE THE EMULATOR IS PLUGGED IN.
Connect an external power supply to the emulator if necessary.
Verify all target cable connections
Verify the target cable is plugged in correctly (pin 1 orientation)
Verify that any adapters you might be using are the correct pin-outs.
Verify the target provides at least 4.5V to the memory socket WHILE THE EMULATOR IS
PLUGGED IN. Connect an external power supply to the emulator if necessary.
Verify the RESET line is connected
Verify your selection of the RESET attachment point
Verify your selection of RESET polarity.
Immediately turn off target power and correct the
problem before reapplying power!
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