Datasheet

5 5
4 4
3 3
2 2
1 1
D D C C B B A A
RTS0 CTS0 D CD0
DTR0
DSR0 RTS1 CTS1 D CD1
DTR1
DSR1
TX1_232 TX0_232 RX0_232 RX1_232
P17 P16 P15 P14 P13 P12 P11 P10P10
P11 P12 P13 P14 P15 P16 P17
VCC5
VCC5
VCC5VCC3
RX0 RX1 TX1 TX0
RX1_232 TX1_232
nLED P1[7..0]
Size Document Number
Sheet o f
Copyright (C) 2003 - Dallas Semiconductor / MAXIM
87-2C420-KIT
Rev B
DS89C450 Evaluation Kit - Serial / Port 1
A
5 6Friday, August 03, 2007
SERIAL PORT 0
LOADER
SERIAL PORT 1
10-SEGMENT RED LED
TURN ON TO PULL
PORT 1 LINES LOW
U9
74AC540
nOE1
1
nOE2
19
I0
2
I1
3
I2
4
I3
5
I4
6
I5
7
I6
8
I7
9
GND
10
VCC
20
nO0
18
nO1
17
nO2
16
nO3
15
nO4
14
nO5
13
nO6
12
nO7
11
U11
MAX203ECWP
VCC
7
T1OUT
5
T2OUT
18
R1IN
4
R2IN
19
C2+
12
C2b+
15
C2-
16
C2b-
11
T1IN
2
T2IN
1
R1OUT
3
R2OUT
20
C1+
13
C1-
14
V-
10
Vb-
17
V+
8
GNDa
6
GNDb
9
J2
DB9 RS232 FEMALE
5 9 4 8 3 7 2 6 1
J3
DB9 RS232 FEMALE
5 9 4 8 3 7 2 6 1
RN4
RESISTOR SIP - 330 OHM
12
3 4 5 6 7 8 9
10
SW5
SW DIP-8
RN3
RESISTOR SIP - 330 OHM
1 2
3 4 5 6 7 8 9 10
R5
680 Ohm
12
U10
LXB10XX
1 2 3 4 5 6 7 8 9 1011
12 13 14 15 16 17 18 19 20