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Meeting Pearls 4
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Meeting Pearls Vol. IV (1996)(GTI - Schatztruhe)[!].iso
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GALer20
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Examples
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GAL22V10.pld
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1996-04-05
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703b
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29 lines
GAL22V10
22V10
Clock A B C D E F NC NC NC NC GND
SyncPre AsyncRe NC NC NC Enable2 Enable1 Y4 Y3 Y2 Y1 VCC
Y1.R = A * B ; Y1 is a registered output => .R
Y1.E = Enable1
Y2.R = C
Y2.E = Enable2 * Y4 ; Attention: there is a feedback of Y4
; (Y4 is defined as output but it's
; used as input again)
Y3 = Enable2 * Y4 ; there is a feedback again
Y4 = D + E + F
AR = F * AsyncRe ; define asynchronous reset
SP = SyncPre ; define synchronous preset
DESCRIPTION
To define the asynchronous reset and the synchronous preset you can use
the keywords AR and SP. But this keywords can't be used as pin names.
For AR and SP is one product term allowed.