HP 98640A Installation And Reference Manual page 48

98640A Analog Input Interface
SYSTEM
CLOCK
SAMP
LACH
C/O
RP
WR
WAIT
PACEN
START
CONVERSION STATE MACHINE CYCLE
o
1 234 56 7 8 9 1011121314151617 18192021222324252627282930
~
.'-----------------
1 ... -----
u
u
-,~---------------------------------------
_______________________
rl~
____________________ _
~----------------~~----------------r
• J
BUSY CYCLE
IA6
Slo...-. _______ _
[ CONVERSION STATE MACHINE MAY BE
HALTED AT EITHER OF THESE POINTS
DTACK
I I
ADDRESSG~~==~~-------
ADDRESSG~.--~L-
____
~
BUSY
L--
BUSY
I
LACH(ALSO
I
SEE ABOVE)
Figure 3-7. Control signal timing, PROM U68 and BUSY state machine.
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