HP 98640A Installation And Reference Manual page 47

SYSTEM
CLOCK
SAMP
LACH
C/O
RP
WR
WAIT
PACEN
START
9 8640A Analog Input Interface
CONVERSION STATE MACHINE CYCLE
o
1 234 56 7
is
91011121314151617 18192021222324252627282930
I
~I
___________________ __
--,
.......
-~
u
u
-,~--------------------------------------
________________________ rl ____________________ __
~------------------~----------------~r
j •
BUSY CYCLE
IA6
S I __________ _
[ CONVERSION STATE MACHINE MAY BE
HALTED AT EITHER OF THESE POINTS
DTACK
I I
ADDRESSG~~==~~-------
ADDRESSG~~-~~
___
~
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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