ER3-1M TechTools, ER3-1M Datasheet - Page 21

• Manufacturer Part Number: ER3-1M
• Description: EMULATOR EPROM ECONOROM III 1MEG
• Manufacturer: TechTools
• Series: EconoROM™ IIIr
• Type: Memoryr

Specifications of ER3-1M

• 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: ER31M

Emulator too slow
EconoROM IIIs are rated at 45ns. The emulator must be at least as fast as the access times required by the
target (smaller numbers are faster). If the target’s access requirements are not documented, you can get a
general idea of its requirements by looking at the EPROM’s rating. The EPROM’s speed is not an absolute
indicator because many EPROMs run faster than they are marked; particularly at full voltage and room
temperature. We have seen many systems that appear to run fine, even though their access times routinely
violate the EPROM’s rating. Fortunately, EconoROM III’s speed rating (45ns) is faster than most
ERPOMs used in embedded systems.
Bad Code
Remember, the one variable that is always changing in this set up is the code itself! If you keep a baseline
code image on hand that is known to work, you could always load that image into the emulator as a sort of
sanity check.
Works but VERY slowly under NT/2000
Using the wrong software
The 16bit software will sometimes work on these systems, but through a virtualization mechanism that is
VERY slow. Our 32bit software uses ring-0 drivers to access the hardware at about 2.5Mbit/sec. Use
Quickloader or ER3LD32.EXE.
If these tips did not solve the problem you
are experiencing, please contact our
technical support people at
[e-mail]
http://www.tech-tools.com
Voice: [phone]
FAX: [phone]
EconoROM III User’s Manual
17
Copyright © 2000, TechTools