JTAG-Booster for IDT 64145
1.4.
Trouble Shooting
Avoid long distances between your Host-PC and the target. If you are using
standard parallel extension cable, the JTAG-BOOSTER may not work. Don't
use Dongles between the parallel port and the JTAG-BOOSTER.
Switch off all special modes of your printer port (EPP, ECP, ...) in the BIOS
setup. Only standard parallel port (SPP) mode is allowed.
On very fast PCs there could be verify errors. To avoid this, watch for the
′IO recovery time′-switch in the BIOS Setup which must be turned on.
Otherwise try to slow down your PC by setting the turbo switch off.
When using older flash devices (nearly maximum erase cycles reached), we
propose to use the /VERIFY option. This is also true for the relatively slow 3 Volt
only flash devices.
Some newer fast flash devices need a setup time between address/data and
the write strobe signal. If programming of this devices fails, try with the option
/WRSETUP again.
If there are problems with autodetection of the flash devices use the /DEVICE=
option. To speed up autodetection specify the option /16BIT or /8BIT.
Don't use hardware protected flash memories.
The used chip selects must be defined as output and inactive in the initialization
file (see chapter 1.6 “Initialization file JTAG145.INI”). Also the address bits must
be defined as output.
JTAG145a.doc
9
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