CAEN
Electronic Instrumentation
UM5175
–
V2495/VX2495 User Manual rev. 1
25
7.6
Power-on Configuration Sequence
When the board is powered on, the on-board programmable devices are configured with the firmware images stored
in their dedicated flash memories. If all programmable devices (MFPGA, UFPGA and GDG) are correctly configured, the
CFG LED is lit on. In case an anomaly occurs, the CFG LED status can be:
1)
BLINKING: the FPGAs are configured, but the Main FPGA remained in Factory mode.
The MFPGA can be configured by two kind of firmware images which are stored on the dedicated flash memory: the
Factory firmware and the Application firmware. The Factory firmware is a basic firmware specifically intended for boot
and recovery functions. The Application firmware is the standard operating firmware and can be upgraded by the user
through the VME or the USB interface.
At power-on, the MFPGA configures itself with the Factory firmware image and subsequently attempts to load the
Application firmware. If the application firmware is missing or corrupted, the MFPGA will remain in the factory mode.
The Factory firmware guarantees the communication with the board and allows the MFPGA Application firmware
upgrade.
2)
OFF: one or more FPGAs may not have been configured.
In this case, the user can take different actions according to the status of the internal configuration LEDs:
•
If the MFPGA Configuration LED is off, an attempt to force the MFPGA in Factory mode can be performed (see
next paragraph). If the CFG LED starts blinking, an application firmware upgrade can be attempted.
•
If the UFPGA Configuration LED is off when the SW5 selector is set on one of the positions between 1 and 5, the
switch should be set to position 0 and the board should be power-cycled. As a consequence, the UFPGA is
configured in Factory mode and the CFG LED will start blinking. It is then possible to attempt a User Application
firmware upgrade on the flash memory page which caused the issue.
•
If the UFPGA Configuration LED is off and the SW5 selector is set to position 0 or the GDG Configuration LED
lights up orange, please contact CAEN for further instructions.
Refer to Chap.
for CAEN Support contacts.
Boot Mode Selection
), when short-circuited, forces the Main FPGA to be reconfigured in Factory mode.
This procedure allows to restore the board from anomalous conditions.
Fig. 7.6:
Boot mode jumper for the Main FPGA
J9 -> Open (default): configures the Main FPGA by the Application firmware (if present or valid)
J9 -> Closed: forces the Main FPGA to configure itself with the Factory firmware (Factory mode).
Note:
The jumper status is checked only at the board power-up.