1-12
1
If data is outputted with a port command, data polarity is set by a port
command. If data is outputted with a string command, data groupings, data
polarity and strobe polarity are set by the configuration commands.
1.6.4
Monitored Digital Inputs
The first fifteen Digital I/O lines (CH1-15) are sampled at an approximate
1 kHz rate and the values placed in the Questionable Register in the 4863/
2363's IEEE-488.2 Status Reporting Structure. Changes may be used to
generate a Service Request. The digital input lines are reported at the
following bits in the Questionable Register:
CH#
- 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
1.6.5
Trigger Output
Trigger pulse generated by 488.2 *TRG or 488.1 GET commands. Pulse
polarity is defined by configuration command. Signal levels same as output
levels in paragraph 1.6.1.
1.6.6
Reset Output
Reset output is pulsed by 488.2 *RST or *RCL command and when the unit
is powered on or reset. Pulse polarity is defined by a configuration
command. Signal levels same as output levels in paragraph 1.6.1.
1.6.7
Remote Output
Remote output level is asserted when the unit is in the GPIB Remote state.
Signal polarity is defined by a configuration command. Signal levels same
as output levels in paragraph 1.6.1. The 4863 will deassert the Remote
output in response to a true Status B input if the unit is not in the GPIB Local
Lockout State.
1.6.8
External Reset Input
The -ExtRst is a low true input with a 10 Kohm pullup that is used to reset
the 4863/2363. The 4863/2363 is held in the reset state while the -ExtRst
input is low. Logic levels are same as the input levels in paragraph 1.6.1.
