— 25 —
3-12. SERIAL INTERFACE CIRCUIT
PC I/F (RC232C)
U18 is latch IC. U18 (HIM232CB) is RS232C transceiver.
TXD, RXD, RTS and CTS are UART communication ports.
VCC
LRXD
LDTR#
LTXD
LDSR#
1000pF X 4
C59
1uF/25V
+
U18
HIN232
T1IN
11
T2IN
10
R1OUT
12
R2OUT
9
C1+
1
C1-
3
C2+
4
C2-
5
T1OUT
14
T2OUT
7
R1IN
13
R2IN
8
VCC
16
V+
2
V-
6
GND
15
C60
1uF/25V
+
C66
1uF/25V
+
C67
1uF/25V
+
C61
0.1uF
L4
MPZ2012S300A
L3
MPZ2012S300A
L1
MPZ2012S300A
L2
MPZ2012S300A
C62
C63
C64
C65
FB1
MPZ3216S500A
P1
CDS3125-0126
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