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CDP1855CE Datasheet(PDF) 11 Page - Intersil Corporation

Part # CDP1855CE
Description  8-Bit Programmable Multiply/Divide Unit
PDF  15 Pages
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

CDP1855CE Datasheet(HTML) 11 Page - Intersil Corporation

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4-57
Y
3Y2Y1Z3Z2Z1
X
3X2X1
--------------------------------------------
Z
3Z2Z1
=
Y
3Y2Y1
X
3X2X1
----------------------
+
FIGURE 5. CASCADING THREE MDU’s (CDP1855) IN AN 1800 SYSTEM WITH MDU’s BEING ACCESSED AS I/O PORTS IN
PROGRAMMING EXAMPLE
FIGURE 6. CASCADING FOUR MDU’s (CDP1855)
C.I.
ZR
YR
RA2
RA1
RA0
CTL
CE
CLR
STB
RD/
BUS
CDP1855
C.O.
ZL
YL
SHIFT
CLK
CN0
CN1
WE
VDD
DATA BUS
C.I.
ZR
YR
RA2
RA1
RA0
CTL
CE
CLR
STB
RD/
BUS
CDP1855
C.O.
ZL
YL
SHIFT
CLK
CN0
CN1
WE
VDD
C.I.
ZR
YR
RA2
RA1
RA0
CTL
CE
CLR
STB
RD/
BUS
CDP1855
O.F.
ZL
YL
SHIFT
CLK
CN0
CN1
WE
VDD
VDD
EF1
BUS
MRD
TPB
CLEAR
N2
N1
N0
MOST SIGNIFICANT
LEAST SIGNIFICANT
OR
VDD
I/O SELECT
88
8
CLOCK
8
TO
CPU
C.I.
ZR
YR
RA2
RA1
RA0
CTL
CE
CLR
STB
RD/
BUS
CDP1855
C.O.
ZL
YL
SHIFT
CLK
CN0
CN1
WE
VDD
DATA BUS
C.I.
ZR
YR
RA2
RA1
RA0
CTL
CE
CLR
STB
RD/
BUS
CDP1855
C.O.
ZL
YL
SHIFT
CLK
CN0
CN1
WE
VDD
C.I.
ZR
YR
RA2
RA1
RA0
CTL
CE
CLR
STB
RD/
BUS
CDP1855
C.O.
ZL
YL
SHIFT
CLK
CN0
CN1
WE
C.I.
ZR
YR
RA2
RA1
RA0
CTL
CE
CLR
STB
RD/
BUS
CDP1855
O.F.
ZL
YL
SHIFT
CLK
CN0
CN1
WE
VDD
VDD
CLOCK
EF1
BUS
MRD
TPB
CLEAR
N2
N1
N0
MOST SIGNIFICANT
LEAST SIGNIFICANT
CDP1855, CDP1855C



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