Datasheet

5 5
4 4
3 3
2 2
1 1
D D C C B B A A
AD0 AD2 AD4 AD5 AD6
A9 A12 A13 A15
P30 P31 P33 P35 P11 P12 P13 P14 P16 P17
AD1 AD3 AD7
A8 A10 A11 A14
P15 P10 P34 P32
VCC5
VCC5 VCC5 VCC5
VCC5
AD[7..0] A[15..8] ALE
P3[5..0] P1[7..0]
RST nPSEN
nLOADER
XTAL1 XTAL2
nEA_IN
nEA_OUT
nWR nRD
Size Document Number
Sheet o f
Copyright (C) 2003 - Dallas Semiconductor / MAXIM
87-2C420-KIT
Rev B
DS89C450 Evaluation Kit - Processor
A
2 6Friday, August 03, 2007
U4C
74AC125
13
12 11 14
7
C16
22pF
10v
12
U3
DS89C4X0
P1.0/T2
1
P1.1/T2EX
2
P1.2/RXD1
3
P1.4/INT2
5
P1.5/INT3
6
P1.3/TXD1
4
P1.6/INT4
7
P1.7/INT5
8
RST
9
P3.0/RXD0
10
P3.1/TXD0
11
P3.2/INT0
12
P3.3/INT1
13
P3.4T0
14
P3.5/T1
15
P3.6/WR
16
P3.7/RD
17
XTAL2
18
XTAL1
19
GND
20
P2.0/A8
21
P2.1/A9
22
P2.2/A10
23
P2.3/A11
24
P2.4/A12
25
P2.5/A13
26
P2.6/A14
27
P2.7/A15
28
PSEN
29
ALE
30
EA
31
P0.0/AD0
39
P0.1/AD1
38
P0.2/AD2
37
P0.3/AD3
36
P0.4/AD4
35
P0.5/AD5
34
P0.6/AD6
33
P0.7/AD7
32
VCC
40
C17
22pF
10v
12
U4B
74AC125
4
5 6
14
7
Y1
16.384 MHz
SOCKETED
1 2
U4D
74AC125
10
98 14 7
DS89C4x0 DIP-40
U4A
74AC125
1
2 3
14
7