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Plug the emulator into your target
Turn the target power off. Plug the ACM target interface cable into the target’s memory socket. Be careful
to align the PIN 1 end of the cable (designated with a stripe) with the PIN 1 end of the target’s socket
(usually designated with a notch, a dot or a ‘1’).
FlexROM III ACMs ship with DIP cables. If you are emulating PLCC type devices, you will need to
purchase a DIP to PLCC adapter. These are available from TechTools as well as all popular adapter
manufacturers.
PLUGGING THE CABLE IN BACKWARDS WILL
DAMAGE FlexROM III!
The number one cause of emulator failure is reverse voltage. The JEDEC standard pin-out for DIP
devices places power and ground on opposite corners of the device. If one plugs an EPROM or an
EPROM EMULATOR in backwards, it applies reverse voltage to the device or emulator, causing
permanent damage.
We added a new reverse-polarity protection circuit to FlexROM III which should greatly reduce the risk of
damage. However, we still strongly recommend that you heed these warnings and make every attempt to
avoid plugging the emulator in backwards.
If your target uses DIP sockets or a TechTools’ PLCC adapter, it is fairly easy to ensure the cable is
plugged in properly. Simply check (twice) that the RED stripe on the cable is aligned with the PIN 1 end of
the socket.
If you are using any type of adapter between the DIP cable and your target, it can get a little more
confusing. An incorrect adapter or one that is installed incorrectly could apply reverse voltages to the
emulator.
If you have ANY doubts, check it out! The simplest way to check out adapters, is to insert the adapter into
the target but do NOT insert the DIP cable into the adapter. The DIP socket provided by the adapter should
have GROUND on one corner pin and POWER on the opposite corner. On 28 pin sockets, ground should
be on pin 14 and power on pin 28. On 32 pin sockets, ground should be on pin 16 and power on pin 32.
Once you have established that the adapter is wired correctly and installed correctly, then insert the DIP
cable into the adapter, aligning its RED stripe with the PIN 1 end of the DIP socket.
PLUGGING THE CABLE IN BACKWARDS WILL
DAMAGE FlexROM III!
The old carpenters’ rule applies here: ‘MEASURE twice – CUT once.’
FlexROM III User’s Manual
6
Copyright ? 2001, TechTools
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