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User's Manual (MUT)
Mod. V977 16 Channel I/O Register (Status A)
27/08/2004
1
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00118/01:V977X.MUTX/01
V977_REV1.DOC
21
11
PATTERN = 1
OUTPUT
CH #n
INPUT
CH #n
INPUT READ
VME REGISTER
INPUT
GATE
INPUT MASK
VME REGISTER
INPUT SET
VME REGISTER
CONTROL
REGISTER
GATE MASK BIT
D
Q
AR
1
D
Q
AR
SINGLE HIT READ
VME REGISTER
MULTIHIT READ
VME REGISTER
OUTPUT MASK
VME REGISTER
OUTPUT SET
VME REGISTER
to OR and IRQ
LOGIC
CLEAR OUTPUT
VME REGISTER
INPUT
CLEAR
AR
Fig. 3.3: Multihit pattern unit mode
In this operating mode the output of one channel is active when a double hit (from front
panel or VME generated) is present. The output can also be set by a write access to the
OUTPUT SET REGISTER.
The outputs can also be masked, individually for each channel, through the OUTPUT
MASK REGISTER.
In this operating mode, the two channel LEDs identify the c hannel status in the following
way:
Left LED: single hit received;
Right LED: double hit received and output signal active.
3.1.3. Test channel
The module is provided with an extra channel (TEST CHANNEL), which differs from the
others since the input pulse is sent by a pushbutton. The TEST channel is completely
handled by the Test control register (see § 4.20).
