CAEN
Electronic Instrumentation
UM5175
–
V2495/VX2495 User Manual rev. 1
42
➢
User LEDs:
Refer to the eight User LEDs on the front panel (see Chap.
SIGNAL NAME
WIDTH
TYPE
DESCRIPTION
LED
8
Output LED drivers
Tab. 10.6:
LED ports description table
In order to switch on one of the eight LEDs on the front panel, the corresponding signal (LED[7:0]) should be set to 1.
➢
Gate & Delay Generator interface ports:
The GDG is connected to the UFPGA via the following signals:
SIGNAL NAME
WIDTH
TYPE
DESCRIPTION
GD_START
32
Output GDG start signals
GD_DELAYED
32
Input
GDG output signals
SPI_MISO
1
Input
SPI MISO (Master Input Slave Output)
SPI_SCLK
1
Output Serial clock
SPI_CS
1
Output SPI Chip Select
SPI_MOSI
1
Output SPI MOSI (Master Output Slave Input)
Tab. 10.7:
Gate and Delay Generator ports description table
➢
Local Bus ports:
The Local Bus signals are shown in
SIGNAL NAME
WIDTH
TYPE
DESCRIPTION
nLBRES
1
Input
Bus reset (active low)
nBLAST
1
Input
Last cycle (active low)
WnR
1
Input
Write/Read cycle
0 = read
1 = write
nADS
1
Input
Address strobe (active low)
nREADY
1
Output
Slave ready/Prefetch request
LAD
32
Input/Ou
tput
Data/address bus
Tab. 10.8:
Local Bus ports description table
