CDP1853 View Datasheet(PDF) - Intersil
Part Name
Description
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CDP1853 Datasheet PDF : 6 Pages
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CDP1853, CDP1853C
CDP1800 SERIES
TPA
TPB
N0 N1 N2 TPB MRD
VDD
CLOCK A
CLOCK B CE N0 N1 N2
CDP1853
01
2-6
7
LOAD VIA 67
INSTRUCTION
DATA AVAILABLE
CS1
CS2
CDP1852
DATA
OUTPUT
PORT 7
SR
MODE TPB
VDD
5 CDP1852 INPUT AND OUTPUT PORTS
CS1
CS2
CDP1852
INPUT
PORT 7
MODE
READ VIA
6F INSTRUCTION
DATA
STROBE
CLOCK
LOAD VIA 61
INSTRUCTION
AVAILABLE
CS2
CS1
CDP1852
OUTPUT
PORT 1
SR
MODE TPB
CS1
CS2
CDP1852
INPUT
PORT 1
MODE
READ VIA
69 INSTRUCTION
DATA
STROBE
VDD
CLOCK
7 OUTPUT PORTS
7 INPUT PORTS
FIGURE 5. N-BIT DECODER IN A ONE-LEVEL I/O SYSTEM
NO, N1, N2
CDP1800 SERIES
TPA TPB
MRD
BUS
NOTE: SYSTEM SHOWN WILL SELECT
UP TO 56 INPUT AND 48 OUTPUT
PORTS. WITH ADDITIONAL DECODING
THE TOTAL NUMBER OF INPUT
DATA BUS
AND OUTPUT PORTS CAN BE
FURTHER EXPANDED.
TPA
CDP1853 I
DECODED
“61” INSTRUCTION
CL CSI
CS2 CDP1852
INTERCONNECTED
AS IN FIGURE 4
NO, N1, N2
NO, N1, N2
CLOCK A
CLOCK B
CE
CDP1853
“62-6F”
INST
CLOCK A
CLOCK B
CE
CDP1853
“62-6F”
INST
I/O
7 INPUT
6 OUTPUT
PORTS
I/O
7 INPUT
6 OUTPUT
PORTS
SECTIONS 3-7
NO, N1, N2
CLOCK A
CLOCK B
CE
CDP1853
“62-6F”
INST
I/O
7 INPUT
6 OUTPUT
PORTS
FIGURE 6. TWO-LEVEL I/O USING CDP1853 AND CDP1852
4-39
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