5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
THIS DRAWING CONTAINS INFORMATION WHICH HAS NOT
BEEN VERIFIED FOR MANUFACTURING AS AN END USER
PRODUCT. INTEL IS NOT RESPONSIBLE FOR THE
MISUSE OF THIS INFORMATION.
BUS RATIO SELECT
FOR PROCESSOR
Address Select Straps
Current Address: 1001
110
THERMAL SENSOR
CRESET# from 443BX (CMOS OUTPUT)
Populate
Routing Guidelines: Route
THERMDP & TERMDN as a
differential pair
Do Not Populate
length of HRESET trace from
ITP the BX/CPU/ITP node
must be between 1.0",3.0"
Don’t Populate QS3257
Don’t Populate Jp1,Jp2,Jp3,Jp4
>>> LAYOUT
1.5V connector, AMP 104078-4 Vertical Recepticle, Top View
of ITP connector with component keep-out area.
RESET# 21
3
2930
4
TYP
0.100
0.284 0.449
0.60
PIN 1
0.794
1.004
0.700
Fairchild: 25V, ID=250uA@VGS=0.85V typ, 1.5V max
10K
10K
Intel(R) 440BX Scalable Performance Board A3
Bus Ratio, Thermal, ITP
Embedded Intel Architecture Division
Intel Corporation
5000 W. Chandler Blvd
Chandler AZ, 85044
C
10 12Wednesday, April 26, 2000
Title
Size Document Number Rev
Date: Sheet
of
TDI 4
TDO 4
TRST# 4
PREQ# 4
PRDY# 4,9
HRESET#3,6
TCK4
TMS4
SM_DATA 8
SM_CLK 8
THERMDP3
THERMDN3
A20M#8
INTR8
IGNNE#_CPU 3
INTR_CPU 3
NMI_CPU 3
A20M#_CPU 3
NMI8
CRESET#6
IGNNE#8
DB_RST 8
V3_3
VCC_CMOS
VCC_CMOS
VCC_CMOS
VCC_CMOS
VCC_CMOS
VCC_CMOS
V3_3
VTT
VTT
V3_3
V3_3
V5_0
V3_3
R109150 ohm
RP62
0 ohm
1
2
3
4 5
6
7
8
R108150 ohm
R33
1K
U6
MAX1617
16
1
13
5
15
9
2
14
3
4
12
11
6
10
7
8
N/C
N/C
N/C
N/C
STBY#
N/C
VCC
SMBCLK
DXP
DXN
SMBDATA
ALERT#
ADD1
ADD0
GND
GND
C103
0.1uF
R42
1K
12
R43
1K
12
R44
3.3K
12
R45
1K
12
R39
1K
R54
0
12
R32
1K
U7
QS3257
2
3
5
6
11
10
14
13
4
7
9
12
16
8
1 15
IOA
I1A
IOB
I1B
IOC
I1C
IOD
I1D
YA
YB
YC
YD
VCC
GND
SE#
R52
270 ohm
1 2
R112
270 ohm
12
JP1
1 2
C101
0.1uF
R34
1K
R35
1K
R36
1K
R37
1K
R40
270 ohm
12
JP2
1 2
JP4
1 2
JP3
1 2
R111
3.3K
12
R53
680 ohm
12
R46
270 ohm
12
R47
150
12
R38
1K
C102
0.1uF
R31
270 ohm
Q4
FDV301N
1
32
R29
EMPTY
R30
EMPTY
J2
ITP
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
GND
GND
GND
TDI
TDO
TRST#
BSEN#
PREQ0#
PRDY0#
PREQ1#
PRDY1#
PREQ2#
PRDY2#
PREQ3#
PRDY3#
RESET#
DBRESET#
TCK
TMS
POWERON
DBINST#
GND
GND
GND
GND
GND
GND
GND
GND
BCLK
R49
270 ohm
1 2
R51 47 ohm
1 2
R50 47 ohm
1 2
R110150 ohm
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