Samsung Electronics
8-21
Schematic DiagramsSchematic Diagrams
8-6. Localtalk diagram
(N.A)
4
DI
5
6
GND1
GND2
7
2
RO
VCC
14
Y 9
Z 10
_RE
3
1UF
C4
U4
74LS74
1
CL
3
CLK
D
2
PR
4
5
Q
Q_
6
U2
MAX491
12
A
11
B
DE
R3
33
VCC
C18
0.1UF
VCC
U6
74LS14
11
10
U6
9
8
0.1UF
C22
68
R2
74LS14
J2
DIN-8P
1
2
3
4
5
6
7
8
R7
27
R12
27
330PF
BEAD
B61
2
C10
27
R8
33
R5
330PF
C6
FILTER-150PF
LF1
1
2
3
C2
1UF
B3
BEAD
1
2
VCC
C15
100PF
68
R1
C16
0.1UF
B7
BEAD
1
2
0.1UF
C20
27
R9
8
9
330PF
C12
330PF
C9
74LS14
U6
13
12
DESUB-9P
J1
1
2
3
4
5
6
7
1K
R15
33
R4
74F32
U5
4
5
6
C5
1UF
30
TRXCB*
16
TXTA
TXTB
29
10
VCC
WE*
40
11
W_REQA*
W_REQB*
34
GND2
36
IEI
8
7
IEO
INT*
6
9
INTACK*
23
PCLK
RD*
41
20
RTSA*
RTSB*
26
13
RTXCA*
RTXCB*
32
RXDA
14
31
RXDB
SYNCA*
12
33
SYNCB*
TRXCA*
15
CTSA*
21
25
CTSB*
1
D0
D1
2
44
D2
D3
3
43
D4
D5
4
42
D6
5
D7
22
DCDA
DCDB
24
DTRA*
19
27
DTRB*
37
D_C*
35
GND1
330PF
C11
Z85230
U1
39
A_B*
CE*
38
1
2
7.3728MHZ
OSC1
CLK
3
2
GND
NC
1
4
VCC
R10
27
27
R11
BEAD
B4
R6
33
VCC
R13
27
C8
330PF
0.1UF
C19
100PF
C14
B1
BEAD
1
2
2
3
74LS14
U6
3
4
VCC
C7
330PF
U6
74LS14
1
2
U5
74F32
1
U6
74LS14
5
6
BEAD
B21
2
VCC
VCC
B5
BEAD
1
2
33UF
C1
23
24
25
26
27
28
29
3
30
4
5
6
7
8
9
CON30
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
74LS14
U7
11
10
0.1UF
C24
VCC
J3
U7
74LS14
3
4
74LS14
U7
5
6
U7
74LS14
9
8
12
74LS14
U7
1
2
C23
330PF
1UF
C3
0.1UF
C17
U7
74LS14
13
C21
0.1UF
C13
330PF
BEAD
B81
2
27
R14
VCC
R16
10K
VCC
4
C2+
C2-
5
15
GND
R1_IN
13
12
R1_OUT
R2_IN
8
R2_OUT
9
11
T1_IN
T1_OUT
14
10
T2_IN
T2_OUT
7
16
VCC
Y+
2
Y-
6
D(0:7)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(0)
D(1)
D(7)
D(6)
D(5)
D(4)
D(3)
D(2)
D(1)
D(0)
SCC_CS*
SCC_CS*
SCC_CS*
MAX232
U3
1
C1+
C1-
3