EPXA4 Datasheet, PDF (6/34 Pages) Altera Corporation – Excalibur Devices

Excalibur EPXA4 Devices Errata Sheet
Configuration
This section provides further information about errata in configuration.
7.1 JTAG Configuration Error
JTAG configuration of the EPXA4 does not complete successfully if there
are programmed EPC configuration devices in the JTAG chain and the
EPXA4 is in boot-from-serial mode. The Quartus II Programmer reports
an error stating that the CONF_DONE signal did not go high.
Debug Module
8.1
Work Around
Erase the EPC devices that are in the chain. This allows successful
configuration in boot-from-serial-mode. Or assert the Boot_Flash pin,
which sets the configuration mode to boot-from-flash. In this mode, you
can successfully configure the device via JTAG.
This section provides further information about errata in the debug
module.
DEBUG_IE_BRKPT and DEBUG_DE_WATCHPT Cause Incorrect
Triggers
The DEBUG_IE_BRKPT and DEBUG_DE_WATCHPT lines do not function. If
asserted, they cause breakpoints or watchpoints to trigger on the wrong
instruction.
Work Around
Do not connect the DEBUG_IE_BRKPT and DEBUG_DE_WATCHPT lines in
your design. The Quartus II software ties them low as appropriate.
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