XVME-212 Manual
August, 1989
Signal
Mnemonic
IACK*
IRQI*
IRQ7*
LWORD*
(RESERV-
ED)
SERCLK
SERDAT
SYSCLK
Table B-l. VMEbus Signal Identification (cont’d)
Connector
and
Pin Number
1 A:20
1 B:24-30
lC:13
2B:3
lB:21
1 B:22
lA:10
Signal Name and Description
INTERRUPT ACKNOWLEDGE: Open-collector or three-
state driven signal from any master processing an interrupt
request. It is routed via the backplane to slot 1, where it
is looped-back to become slot 1 IACKIN in order to start
the interrupt acknowledge daisy-chain.
INTERRUPT REQUEST (l-7): Open-collector driven
signals,
generated by an interrupter, which carry
prioritized interrupt requests. Level seven is the highest
priority.
LONGWORD: Three-state driven signal indicates that the
current transfer is a 32-bit transfer.
RESERVED: Signal line reserved for future VMEbus
enhancements. This line must not be used.
A reserved signal which will be used as the clock for a
serial communication bus protocol which is still being
finalized.
A reserved signal which will be used as the transmission
line for serial communication bus messages.
SYSTEM CLOCK: A constant 16-MHz clock signal that is
independent of processor speed or timing. It is used for
general system timing use.
B-4
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Содержание XVME-212
Страница 59: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 61: ...N N N N N 7 Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 63: ...Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 64: ...W N Z Z l Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...