Caen V2495, User Manual

Page: 24 / 62

CAEN
Electronic Instrumentation
UM5175 – V2495/VX2495 User Manual rev. 1
24
7.4 Setting the VME Base Address
Fig. 7.4: Base Address on-board rotary switches
Four on-board rotary switches (SW1, SW2, SW3 and SW4 in Fig. 7.4 ), with 16 positions each, set the hexadecimal value
of the VME Base Address (VBA) which univocally identifies the board over the VME bus. Such switches are placed on
the component side of the motherboard (see
Fig. 3.1 ).
•
SW1 sets bits [31:28] of VBA;
•
SW2 sets bits [27:24] of VBA;
•
SW3 sets bits [23:20] of VBA;
•
SW4 sets bits [19:16] of VBA.
VX2495 also supports the geographical addressing.
7.5 Selecting the User FPGA Firmware
Fig. 7.5: User Firmware rotary switch
The on-board SW5 rotary switch selects which of the six firmware images will be loaded on the UFPGA at power-on.
Five demos and one boot and recovery (factory) firmware are preloaded in the flash memory (see Chap.
11 for details).
Default SW5 position map:
Position 0 = Factory User Firmware; this copy is used as recovery boot and is not writable by the user.
Position 1 = Gate Pattern Demo (see Sect. Gate Pattern Demo Description )
Position 2 = Pattern Recorder Demo (see Sect. Pattern Recorder Demo Description )
Position 3 = DAC (A395E) Demo (see Sect. DAC Demo Description )
Position 4 = Gate and Delay Demo (see Sect. Gate and Delay Demo Description )
Position 5 = available (empty)

Note: All the positions from 6 up to 15 are equivalent to position 0: factory firmware is loaded.