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6 Reference Information
SAM4S ER-380 SERIES 6-5
6-1 Semiconductor Base Diagram
6-1-4 Other ICs
Figure 6-8 Motor Driver LB1838 Specification
82C55A (PLCC)
TOP VIEW
CS
G
ND
A1
A0
PC7
PC6
PC5
PC4
PC0
PC1
P
C3
P
B0
P
B1
P
B2
P
B3
P
B4
P
B5
P
B6
P
B7
NC
NC
RESE
T
D0
D1
D2
D3
D4
D5
D6
D7
V
CC
RD
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
WR
NC
PC2
NC
44 43 42 41 40
39
38
37
36
35
34
33
32
31
30
29
2827
123456
262524232221201918
7
8
9
10
11
12
13
14
15
16
17
82C55A BASIC OPERATION
A1 A0 RD WR CS
INPUT OPERATION
(READ)
00010Port A Data Bus
01010Port B Data Bus
10010Port C Data Bus
11010Control Word Data Bus
OUTPUT OPERATION
(WRITE)
00100Data Bus Port A
01100Data Bus Port B
10100Data Bus Port C
11100Data Bus Control
DISABLE FUNCTION
XXXX1Data Bus Three-State
X X 1 1 0 Data Bus Three-State
Figure 6-9 82C55A Specification
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V
CC
GND
T1OU
T
R1IN
C2+
C1-
V+
C1+
MAX202E
MAX232E
R1OU
T
T1IN
T2IN
R2OU
T
R2IN
T2OUT
V-
C2-
Figure 6-10 RS-232 Transceiver MAX232
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t
h
T
a
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e
I
N
1
,
2
E
N
A
1
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2
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3
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ode
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35


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