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CDP1871A Arkusz danych(PDF) 2 Page - Intersil Corporation

Numer części CDP1871A
Szczegółowy opis  CMOS Keyboard Encoder
PDF  10 Pages
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Producent  INTERSIL [Intersil Corporation]
Strona internetowa  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

CDP1871A Arkusz danych(HTML) 2 Page - Intersil Corporation

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CDP1871A, CDP1871AC
FIGURE 1. TYPICAL CDP1800 SERIES MICROPROCESSOR SYSTEM USING THE CDP1871A
FIGURE 2. CDP1871A BLOCK DIAGRAM
0.1
µF
36
VDD
100K
40
DEBOUNCE
CS1,
CS2,
CS3
CS4
TPB
SHIFT
23
24
21
34
CONTROL
ALPHA
39
CONTROL
SHIFT
38
BUS0-BUS7
CONTROL
MRD
D11
D1
ALPHA LOCK
NORMAL
VDD
TPB
N0-N2
37
BUS0-BUS7
CDP1800-SERIES
CPU
CDP1871A
S1
12
S2
13
S3
14
S4
15
S5
16
S6
17
S7
18
S8
19
8 BIT DATA BUS
11
UP TO 11 SETS
OF 8 SWITCHES EACH
1
32
25
CS1
CS2
CS3
21
22
23
24
34
CS4
TPB
CS
CONTROL
LOGIC
KEY
DETECT
36
DEBOUNCE
CX
RX
VDD
RN
F/F
33
DA
35
RPT
STATUS
LATCHES
KEY DOWN
DETECT
1 OF 8
MUX
RPD
RPD
FROM
KEY BOARD
12
19
SENSE
LINES
1
11
TO
KEY BOARD
DRIVE
LINES
DI
DII
37
ALPHA
DECODER/
DRIVERS
II
LATCH
39
SHIFT
38
CONTROL
RPD
RPD
THREE-STAGE
SCAN COUNTER
FIVE-STAGE
SCAN COUNTER
C1-C3
C4-C8
THREE-STATE
OUTPUT
BUFFERS
BUS ENABLE
25
32
BUS 0
BUS 7
40
20
VDD
VSS
SCAN CLOCK



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