CD1284 Datasheet, PDF (172/176 Pages) Intel Corporation – IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports

CD1284 — IEEE 1284-Compatible Parallel Interface Controller
12.0 Appendix B
Figure 34. UART to RS232 and IR Port Interface Motherboard Example Schematic
+
10 mF
10 OHM
0.1 mF
0.1 mF
+
+3V
10 mF
8
VA+
5
AGND
12
VD+
19
EXTCLK
XTALIN ¹⁷
NOTES:
(1) This circuit has not yet been
built and debugged.
(2) Choice of LED, power consumption,
and physical positioning will affect R value.
BPV23NF ⁷ _PINC
3.6864 MHz
XTALOUT ¹⁸
TSHA5502
6
PINA
RESET ¹¹
+
+3V
47 mF
CS8130 RXD ¹³
FORM/BSY ¹⁶
5.2 W (2)1 _LED1C
5.2 W (2)4 _LED2C
TXD ¹⁴
D/C ¹⁵
PWRDN ¹⁰
CLKFR ⁹
TGND1 TGND2 DGND
2
3
20
0.33 mF
+3V
0.33 mF
0.33 mF
DSR
6
CTS
DB9
8
RXD
Serial
2
Connector
DCD
1
(COM PORT) ^RI
9
DTR
4
RTS
7
TXD
3
SG
5
5 _CIA-
2 _CIA+
1
V_CC
14
EN
SHDN ¹⁵
4 _CIB-
3
CIB+
23 R1IN
C2+ ²⁵
MAX562
C2-
24
R1OUT 6
22 R2IN
21 _R3IN
20 _R4IN
19 R5IN
R2OUT 7
R3OUT ⁸
R4OUT 9
R5OUT 10
18 T1OUT
T1IN 11
17 T2OUT
T2IN 12
16 T3OUT
T3IN 13
0.33 mF
GND
27
V- ²⁶
V+ ²⁸
0.68 mF
0.33 mF
RS-232/IR
SELECT
CD1284
DSR
CTS
RXD
DCD
RI
DTR
RTS
TXD
172
Datasheet