Cirrus Logic CS8130 - Manual (Page 23)

VA+ VD+
AGND
PINC
PINA
LED1C
LED2C
RESET
TGND1 TGND2 DGND
EXTCLK
XTALIN
XTALOUT
RXD
FORM/BSY
TXD
D/C
PWRDN
CLKFR
8 12
5
7
6
1
4
19
17
18
13
16
14
15
10
9
2 3 20
0.1 µ F
+
10 µ F
+3V
0.1 µ F
+
10 µ F
+
47 µ F
+3V
10 Ω
5.2 Ω (2)
5.2 Ω (2)
3.6864 MHz
CS8130
BPV23NF
TSHA5502
CIA-
CIA+
MAX562
VCC
CIB-
CIB+
T1OUT
T2OUT
R1IN
R2IN
V-
V+
GND
27
28
26
3
4
1
5
2
0.33 µ F
+3V
0.33 µ F
0.33 µ F
C2+
C2-
24
25
0.33 µ F
0.68 µ F 0.33 µ F
5
20
21
22
23
DTR
DB9
Serial
Connector
(COM PORT)
R1OUT
R2OUT
R3OUT
R5OUT
R4OUT
EN
SHDN
15
14
R3IN
R4IN
R5IN
T3OUT
T2IN
T1IN
T3IN 16
17
18
19
9
8
7
6
13
12
11
10
RTS
TXD
RXD
DCD
RI
DSR
CTS
6
8
2
1
9
4
7
3
DTR
RTS
TXD
RXD
DCD
RI
DSR
CTS
SG
UART
RS-232/IR
SELECT
11
Notes:
(1) This circuit has not yet been
built and debugged.
(2) Choice of LED, power consumption
and physical positioning will affect R value.
UART to both RS232 and IR Port Interface
Motherboard Example Schematic
Steven Harris
Crystal Semiconductor
5/26/94
Figure 8. IR and RS232 from 1 UART
CS8130
DS134PP2 23
CS8130
DS134F1 23