TrueTime VME-SG2 560-5608, Manual

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Two Time Compare register sets are available that are preset with time values from
hundreds of days through microseconds via the VME bus. When either compare time is
equal to the generator time an output pulse is generated.
Four independently programmable interrupts are available each with software selectable
priority. The interrupt sources are the External Event, Rate Pulse, Time Compare 1 and
Time Compare 2.
The VME-SG-GPS is configured as an A16/D16 slave board responding to the Address
Modifier codes hex 29 (short non-priviledged) and hex 2D (short supervisory). The
VME-SG-GPS is memory mapped on any 256 byte boundary of the VME bus short
address space using the eight position DIP switch located on the board.
1.3 PHYSICAL DESCRIPTION
The VME-SG configuration is a single slot board meeting the VME standard 6U height
specification. When the optional display is added two slots are required. The GPS-VME
configuration requires two slots with a 6U height.
1.4 ENVIRONMENTAL SPECIFICATIONS
The Model VME-SG-GPS is designed to operate over a wide ambient temperature
range.
The environmental specifications are:
a. Operating - 0 to +50 degrees C (+32 to +122 F)
b. Storage - -17 to +100 degrees C (0 to +212 F)
c. Humidity - To 95% relative, non-condensing
1.5 POWER REQUIREMENTS
The maximum input power specifications are:
a.Voltage - +5VDC @ 700 ma
+ 12 VDC @ 50 ma each,
(from VME bus connector)
1.6 SIGNAL SPECIFICATIONS
1.6.1 GENERAL TO ALL MODES
A. VME Bus - Falling edge of /DSA to falling Access Time edge
of /DTAK is less than 400 nanoseconds.
B. Interrupts
Number - Four independent
Priority - Configurable to any of seven levels.
Sources - External Event
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