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Schematic Diagrams
B - 24 LPT/COM Port (71-D40U0-D03)
B.Schematic Diagrams
LPT/COM Port
Sheet 23 of 42
LPT/COM Port
VDD3
+5V
+5V
VDD5
+5V
VDD5
+5V
CTSA#22
DCDA#22
DSRA#22
DTRA22
RTSA#22
SOUTA22
SINA22
RIA#22
PACK#22
PBUSY22
PPE22
PSLCT22
PSTB#22
PATFD#22
PSLIN#22
PME# 19,22,24,25
PINIT#22
PPERR#22
PD[0..7]22
COM1RI
COM1RI
PPERR#
PSLIN#
PD1
PD0
PATFD#
PSTB#
PBUSY
PACK#
PPE
PSLCT
PATFD#
PBUSY
PSTB#
PPE
PSLCT
PACK#
SINA
RTSA#
DTRA
RIA#
CTSA#
DSRA#
SOUTA
DCDA#
PD4
PD5
PD7
PD6
PD2
PSLIN#
PINIT#
PD3
PME#
PD3
PD2
PD5
PD[0..7]
PD7
PD4
PD6
PD1
PINIT#
PPERR#
PD0
R725 0
C285
0.1UF
R2 2K
RP2
10P8R-4.7K
1
2
3
4
5
10
9
8
7
6
1
2
3
4
5
10
9
8
7
6
Q1
2N7002
G S
D
R285
100K
R1 FCM1608K221
C306
0.1UF(K%)
C270
0.1UF(K%)
C307
0.1UF(K%)
D22
1SS355
A C
C269
0.1UF(K%)
CP4
8P4C-180P
18
27
36
45
C2
180P
CP1
8P4C-180P
18
27
36
45
CP5
8P4C-180P
1 8
2 7
3 6
4 5
CP6
8P4C-180P
1 8
2 7
3 6
4 5
JPRT1
PRT_PORT
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
28
29
RP1
10P8R-4.7K
1
2
3
4
5
10
9
8
7
6
1
2
3
4
5
10
9
8
7
6
R286
100K
T
U16
MAX3243
28
24
1
2
14
13
12
20
19
18
17
16
15
23
22
21
27
3
9
10
11
4
5
6
7
8
25
26
C1+
C1-
C2+
C2-
T1IN
T2IN
T3IN
R2OUTB
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
FORCEON
/FORCEOFF
/INVALID
V+
V-
T1OUT
T2OUT
T3OUT
R1IN
R2IN
R3IN
R4IN
R5IN
GND
VCC
R268 100K
R267 100K(R)
RN2 BK32164S471
81
72
63
54
RN3 BK32164S471
81
72
63
54
RN1 BK32164S471
81
72
63
54
RN48
FCA3216K4-221
1 8
2 7
3 6
4 5
JCOM1
COM1_DB9
5
9
4
8
3
7
2
6
1
12
13
CP3
8P4C-120P
18
27
36
45
CP2
8P4C-120P
18
27
36
45
RN49
FCA3216K4-221
1 8
2 7
3 6
4 5
RN4 BK32164S471
81
72
63
54
R724 0(R)