MOD E L 3562A
RAM G R L/GW
RASLL
RASU L
R F D L
ROW E N
RSTL
STRO B E
SYNC
TCL
WEL
W LOAD L
YA
through
YH
C I RC U I T D E SCR I PT I O N S
RAM global read (active 10w)Jglobal write. Used to generate the W E L
signal to allow a write transfer i nto memory.
Row add ress strobes. Clock the m u ltiplexed add ress i nto the dynamic
RAMs.
Ready for data, active low. S ignal from d isplay to inform control ler
that previous data point has been processed and a new data poi nt is
requ i red.
Row enable. Switches the output of the address mu ltiplexer.
Rest. Software reset for the global RAM board, originates from the
system C P U .
Signal from global timing circ u it used to generate global data strobe
(G DSL).
Output of the d isp lay refresh timer, used to synchronize frame refresh
(approximately 61 Hz).
Terminate cou nt, active low. I nd icates that the display word count
has gone to zero .
Write enable, active low. A l l ows a write transfer into memory.
Word load, active low. Allows the word count from the system CPU
to be loaded into the d isplay word cou nters.
Memory grant l i nes from the priority decoder to the bus d river.
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Summary of Contents for 3562A
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Page 237: ...Sample Clock SAMP DS DATA oe _ _ _ _ _ BUS NOTE FULL SPA BASi BAI MODE ...
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Page 305: ...c c I O Sequencer S r J Sequence Decoder ...
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