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8 7 6 5 4 3 2 1
Advanced Micro Devices
SiS741CX Chipset for AMD SOCKET-A,
D DDR SDRAM Demo Board Schematics D
(11/7/2005) Rev : 6
PAGE Content PAGE Content
31 Data Acquisition & Jumpers
1 Cover Page
32 AC'97 Codec (ALC203/WM9712L)
2 SiS741GX System Block Diagram
33 Audio INPUT & OUTPUT
3 Power Supply Block Diagram
Revision History 34 ROM
4
35 RTC (3V)
5 Notes
36 VCC1.8V & SB1.8V & SB3V & VDDQ & IVDD & AUX_IVDD
C 6 SOCKETA-1 C
37 VCC3_DUAL & VCC5_DUAL & VCC1.8_DUAL
7 SOCKETA-2
38 VCC_M & SB_M & DDR_VTT (DDR SDRAM)
8 SOCKETA-3
39 VCC_DIMM (DDR SDRAM)
9 SiS 741CX-1 (Host/AGP)
40 FAN5240 NX Processor PWM
10 SiS 741CX-2 (Memory for SDRAM)
41 NX Processor VID Mux
11 SiS 741CX-3 (MuTIOL/VGA/Others)
42 Power Connector
12 SiS 741CX-4 (Powers)
43 LCD interface
13 SiS 964-1 (PCI/IDE/MuTIOL)
44
14 SiS 964-2 (Misc. Signals)
45
15 SiS 964-3 (USB/SATA)
46
16 SiS 964-4 (Powers)
47
17 HARDWARE TRAP(For 964)
48
18 Main Clock Generator(For 964)
49
19 Clock Buffer-1 (for DDR SDRAM)
50
20 DDR SDRAM
B 21 51 B
DDR SDRAM SSTL-2 Termination Resistors
52
22 VGA Connector 53
23 IDE Connector
54
24 PCI Slot 1 55
25 USB Connectors
56
26 LAN PHY (OPTION:RTL8201) AND RJ45
57
27 Keyboard & Mouse Connectors
58
28 W83697HF-1 (SUPER I/O OPTION: 2)
59
29 W83697HF-2 (COM and Print Port)
60
30 W83697HF-4 (Hardware Monitor)
(c) 2005 Advanced Micro Devices, Inc. All rights reserved.
AMD, the AMD Arrow logo and combinations thereof, and Geode are trademarks of Advanced Micro Devices, Inc. Other product names used in this publication
are for identification purposes only and may be trademarks of their respective companies.
The contents of this document are provided in connection with Advanced Micro Devices, Inc. ("AMD") products. AMD makes no representations or warranties with
respect to the accuracy or completeness of the contents of this publication and reserves the right to make changes to specifications and product descriptions
A at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this A
publication. Except as set forth in AMD's Standard Terms and Conditions of Sale, AMD assumes no liability whatsoever, and disclaims any express or implied
warranty, relating to its products including, but not limited to, the implied warranty of merchantability, fitness for a particular purpose, or infringement
*AMD/LOGIC CONFIDENTIAL*
Design Create Date = Monday, December 22, 2003
of any intellectual property right. AMD's products are not designed, intended, authorized or warranted for use as components in systems intended for surgical LOGIC 411 WASHINGTON AVE. N
implant into the body, or in other applications intended to support or sustain life, or in any other application in which the failure of AMD's product could MINNEAPOLIS, MN 55401
create a situation where personal injury, death, or severe property or environmental damage may occur. AMD reserves the right to discontinue or make changes PRODUCT PHONE: (612) 672-9495
to its products at any time without notice. DEVELOPMENT FAX: (612) 672-9489
Title Cover Page
Size B Number 1002124 Rev 6
Date Thursday, March 23, 2006 Project AMD Geode NX Sheet 1 Of 43
8 7 6 5 4 3 2 1
Note:
Do not include the schematic
System Block Diagram
when create netlist.
2*SATA
SIS741GX for AMD SOCKET-A, DEMO BOARD FULL FUNCTION BLOCK 3*CPUs
2*AGP
8*PCIs
Main
D 2*MuTIOLs Clock
Gen.
D
AMD 1*48MHz
1*24/48MHz
SOCKET-A 3*REF
2*APIC
P.22,23
1*CLK_IN#
3*CLK_OUT# DDR/SDR
S2K Bus Clock
FB_OUT/# Buffer
FB_IN/#
P.24,25
AGP / Video Bus
Video Bus Connectors DDR SDRAM
SiS741GX 200/266/333 MHz
DIMM 1
C VGA Connector C
P.8,9,10,11
MuTIOL
Interface
533 MHz
PCI SLOT 1 1G Bytes/sec
LAN PHY
Analog In
ATA133
SiS964/963L AC'97 Analog Out
Audio Codec
IDE 1 Serial ATA 3D Audio Out
B B
KEYBOARD PS/2
/MOUSE
USB 0 USB 4
LPC Bus
USB 1 USB 5
LPC Rom
USB 2
USB 3
FAN FAN CONTROL VOLTAGE MONITOR
1
TEMPERATURE MONITOR
LPC Super I/O
A A
Design Create Date = Monday, December 22, 2003
LOGIC 411 WASHINGTON AVE. N
MINNEAPOLIS, MN 55401
GPIOs IR SERIAL PARALLEL PRODUCT PHONE: (612) 672-9495
DEVELOPMENT FAX: (612) 672-9489
Title Eagle System Block diagram
Size B Number 1002124 Rev 6
Date Friday, January 13, 2006 Project AMD Geode NX Sheet 2 Of 43
5 4 3 2 1
Power Supplies
VCC3
SB5V
ATX VCC5
POWER +12V SB3V RTC_VDD
D CONNECTOR -5V Switch (3.3V) D
-12V Battery Circuit
P.42
SB5V LM1117 SB3V P.35
800mA
LDO TLV431A 100mA AUX_IVDD
Reg. (1.9V)
P.36
LM1117 SB2.5V P.36
800mA
LDO LM1117 800mA SB1.8V
LDO
P.38
P.36
SB2.5V VCCM
C Switch C
VCC2.5V Circuit
P.34 VCCM DDR_VTT
LP2995 1.25V
VCC2.5V LDO
P.21
SPX1587 VCC1.8V
SB5V VCC5_USB 3A LDO
Switch
VCC5 Circuit
P.36
IVDD
VCC3 TLV431a VCC2.5V SPX1587 (1.9V)
B controlled 3A LDO B
FET
P.36
P.38
VCCA
VCCSA LP2985 (2.5V)
VCC3 Passive LDO
Filter
P.7
P.32
VCC3 CLK3.3V
Passive
Filter
P.17
+12V VCC_CORE Design Create Date = Monday, December 22, 2003
FAN5240 411 WASHINGTON AVE. N
VCC5 Switcher
LOGIC MINNEAPOLIS, MN 55401
A A
PRODUCT PHONE: (612) 672-9495
P.39 DEVELOPMENT FAX: (612) 672-9489
Title Power block diagram
Size A Number 1002124 Rev 6
Date Friday, January 13, 2006 Project AMD Geode NX Sheet 3 Of 43
5 4 3 2 1
8 7 6 5 4 3 2 1
DATE Rev Description
1/30/2005 1.0 The initial version for proto build 1 (30 boards).
3/1/2005 2.0 Proto build 2 (30 boards).
1) Page 6 Added NX1500 Processor part number to schematic.
2) Page 7 Changed R54 (0 Ohm) from 0805 to 0603
3) Page 7 R46,R51 changed from 0603 to 0402.
D 4) Page 7
5) Page 9
Changed HDT header to "do not populate".
Changed R62 from 60 to 60.4 Ohms, changed Q49
D
6) Page 18 Changed R197 from 0 Ohms to 10 Ohms.
7) Page 18 C141,C142,C144 (10pF) Changed from "do not populate" to installed.
8) Page 22 UD1-UD7 PCB footprint corrected.
9) Page 25, 26 Changed Ethernet/USB connector to no-cap, symetrical.
10) Page 26 Connect pins 11,17 of U8 to ground.
11) Page 26,29,42 Changed manufacturer of Ferrite L35-L37, FB14 to Steward.
12) Page 29 CN1-CN4, C231 changed from 180pF to 220pF.
13) Page 32 R370 Changed from installed to "do not populate" .
14) Page 34 Added EEPROM info to EEPROM socket.
15) Page 35 Added battery (CR2032) to schematic.
16) Page 35 Added jumper JP39 to 3 pin header.
17) Page 36 R398 Changed from 5% to 1%.
18) Page 40 Isolated FAN5420 grounds from DIG GND
19) Page 42 R42 Changed from 10k to 75K.
20) Page 43 Changed LCD voltage selector header to 3 pin to avoid power supply shorting.
21) Page 48 Changed Q49 from IRFW510A to IRFW520A
22) Page 37 Changed 2 USB power supply caps from 2 ELE to 1 TAN and 1 ELE.
23) Page 41 Added buffers to reset circuit, so NB,SB,CPU,VID_MUX have individual resets.
5/9/2005 3.0 Rev 3 PC board.
1) Page 7 Changed HDT pullup resistors, R31-R35, to 270 Ohms.
2) Page 7 Changed comparator to dual comparator for cost reduction. Added R483 as a pullup for the output.
3) Page 7 Changed C10 to 22uf 10V SMT TAN.
4) Page 7 Changed R19,R26,R27,R37-40,R42-44 from 680 1% to 680 5%.
5) Page 7 Changed R17,R18 from 470 1% to 470 5%.
C 6) Page 7 Changed R45 from 270 1% to 270 5%. C
7) Page 9 For AGP voltage change, R29 moved from VCC_CORE to 3.3V.
8) Page 9 For AGP voltage change, R58, R63 moved from 1.8V to 3.3V.
9) Page 9 Moved LCD LCD_EN- and BKLTEN from 964 (page 14)to 741.
10) Page 9 Changed R70 from 10 1% to 10 5%.
11) Page 10 Changed R98-99,R105-108,R474-475 from 10 1% to 10 5%.
12) Page 12 For AGP voltage change, C57,C65,CC92,C94,C97 moved from 1.8V to 3.3V.
13) Page 12 For AGP voltage change, 741 VDDQ power pins (9) moved from 1.8V to 3.3V.
14) Page 12 Changed C55, C56, C57, C62 to larger 1206 footprint.
15) Page 16 Changed C133, C134, C135 to larger 1206 footprint.
16) Page 18 Added 10K resistor R30 to pull up gate of Q5.
18) Page 18 Changed C145, C147 to larger 1206 footprint.
19) Page 18 Changed R190,R192,R197,R199,R200 from 10 Ohm 1% to 10 Ohm 5%.
20) Page 15 Changed CB37, CB40, CB41, CB45 to 22uf 10V SMT TAN.
21) Page 19 Changed C168, C171 to 22uf 10V SMT TAN.
22) Page 19 Changed C162 to larger 1206 footprint.
23) Page 21 Changed C176 to larger 1206 footprint.
24) Page 23 Changed R269 from 470 1% to 470 5%.
25) Page 24 Added 1uF 16V CER (C257) to 12V at PCI conn. Added 22uF 6.3V CER (C251,C252) to 5V and 3.3Vat PCI conn.
26) Page 25 Change C199 from SMT Tantalum to ELE.
27) Page 25 Changed R275,R277,R279 from 560K 1% to 560K 5%.
28) Page 26 Changed routing to RN43 and RN44 to minimize solder shorts.
29) Page 28 Added C358 to battery monitor input.
30) Page 28 Remove SIO OVT# pin from THERM- net.
31) Page 29 Changed serial port wake-up circuit.
32) Page 30 Add circuit to latch output of thermal monitor chip. Added U22 and C41. Removed Q48 and R322.
33) Page 30 Changed C232 to 22uF 16V SMT ELE.
34) Page 32 Changed C279 to larger 1206 footprint.
35) Page 33 Change C286, C287 from SMT Tantalum to SMT ELE.
B 36) Page 35 Changed C293, C294, C297 to larger 1206 footprint. B
37) Page 36 Changed C298 to 22uf 10V SMT TAN.
38) Page 36 Changed C304 to larger 1206 footprint.
39) Page 36 Changed R395 to 47 Ohms to change IVDD from 1.9V to 1.7V.
40) Page 38 Changed C317 to 22uf 10V SMT TAN.
41) Page 38 Change R408 to 130 Ohms to change 2.5V supply from 2.48V to 2.55V.
42) Page 40 Changed FAN5420 softstart cap C326 from .1uf to .22uF.
43) Page 40 Re-loaded R417,R418, R423,R426 to correct incorrect footprint.
44) Page 42 Changed C337 to 22uf 10V SMT TAN.
45) Page 42 Changed R329 from 10 Ohm 1% to 10 Ohm 5%.
46) Page 43 Inverted LCD power enable by adding Q11 and R416.
47) Page 43 Change LCD Data Enable resistor, R461, to installed.
7/10/2005 4.0 Rev 4 PC board.
1) Page 7 Added pull-up 680 ohm (R66) to PLL_TEST#.
2) Page 9 For AGP voltage change, R58, R63 moved from 3.3V to 1.8V.
3) Page 12 For AGP voltage change, C57,C65,CC92,C94,C97 moved from 3.3V to 1.8V.
4) Page 12 For AGP voltage change, 741 VDDQ power pins (9) moved from 3.3V to 1.8V.
5) Page 33 Re-loaded J7 to correct incorrect footprint.
11/7/2005 5.0 Rev 5 PC board.
1) Page 34 Changed U14 supply voltage from 5V to 3.3V.
2) Page 36 Changed R395 from 47 Ohms to 49.9 Ohms to increase the 1.7V supply by 28 mV.
3) Page 43 Added I2C bus to TFT connectors through 0Ohm resistors.
4) Page 9 Added a testpoint to U4.D7, SBA0
A A
01/13/2006 6.0 Rev 6 PC board. Design Create Date = Monday, December 22, 2003
LOGIC 411 WASHINGTON AVE. N
MINNEAPOLIS, MN 55401
PRODUCT PHONE: (612) 672-9495
DEVELOPMENT FAX: (612) 672-9489
Title Revision History
Size B Number 1002124 Rev 6
Date Friday, January 13, 2006 Project AMD Geode NX Sheet 4 Of 43
8 7 6 5 4 3 2 1
DATE Rev Description Page
2/01/05
D D
C C
B B
A A
Design Create Date = Monday, December 22, 2003
LOGIC 411 WASHINGTON AVE. N
MINNEAPOLIS, MN 55401
PRODUCT PHONE: (612) 672-9495
DEVELOPMENT FAX: (612) 672-9489
Title Notes
Size B Number 1002124 Rev 6
Date Friday, January 13, 2006 Project AMD Geode NX Sheet 5 Of 43
8 7 6 5 4 3 2 1
SDATAINCLK-[0..3] L1 L2
SDATAINCLK-[0..3] SOFT_VID0 ADINCLK- 1 MADINCLK- SADDINCLK-
2 1 2 SADDINCLK-
SDATAOUTCLK-[0..3] SOFT_VID2 10nH 1A Q = 50 SRF = 4G 10nH 1A Q = 50 SRF = 4G
SDATAOUTCLK-[0..3] SOFT_VID3 1000663 C1 1000663
SADDIN-[2..14] SOFT_VID4 1008CS-100XJBC 5pF 1008CS-100XJBC
SADDIN-[2..14] SOFT_VID1 1000779
SADDOUT-[2..14] THERMDA ECJ-0EC1H050J
SADDOUT-[2..14] THERMDA
SDATA-[0..63] THERMDC
SDATA-[0..63] THERMDC
VCC_CORE
AC31
AD30
AA31
W31
AD8
G11
G13
G19
G21
G27
G29
G31
Q31
H10
H28
H30
H32
N31
U31
K30
S31
Y31
F30
L31
J31
D D
W7
H6
H8
U7
K8
S7
Y5
F8
J5
VP1
SDATA-0 AA35 AJ33 ADINCLK-
NC1
NC2
NC3
NC4
NC5
NC6
NC7
NC8
NC9
NC10
NC11
NC12
NC13
NC14
NC15
NC16
NC17
NC18
NC19
NC20
NC21
NC22
NC23
NC24
NC25
NC26
NC27
NC28
NC29
NC30
NC31
NC32
NC33
NC34
SDATA-1 SYSDATA#0 SYSADDINCLK# 680
W37 SYSDATA#1
SDATA-2 W35 AJ29 SADDIN-0 R1 1000555 9C04021A6800FLHF3
SDATA-3 SYSDATA#2 SYSADDIN#0 SADDIN-1 R2 1000555 9C04021A6800FLHF3
Y35 SYSDATA#3 SYSADDIN#1 AL29
SDATA-4 U35 AG33 SADDIN-2
SDATA-5 SYSDATA#4 SYSADDIN#2 SADDIN-3 680
U33 SYSDATA#5 SYSADDIN#3 AJ37
SDATA-6 S37 AL35 SADDIN-4
SDATA-7 SYSDATA#6 SYSADDIN#4 SADDIN-5 H1
S33 SYSDATA#7 SYSADDIN#5 AE33
SDATA-8 AA33 AJ35 SADDIN-6
SDATA-9 SYSDATA#8 SYSADDIN#6 SADDIN-7 Processor
AE37 SYSDATA#9 SYSADDIN#7 AG37
SDATA-10 AC33 AL33 SADDIN-8 1000600
SDATA-11 SYSDATA#10 SYSADDIN#8 SADDIN-9 AMD
AC37 SYSDATA#11 SYSADDIN#9 AN37
SDATA-12 Y37 AL37 SADDIN-10 NX1500
SYSDATA#12 SYSADDIN#10
SDATA-13
SDATA-14
SDATA-15
AA37
AC35
S35
SYSDATA#13
SYSDATA#14
SOCKETA-1 SYSADDIN#11
SYSADDIN#12
AG35
AN29
AN35
SADDIN-11
SADDIN-12
SADDIN-13
SDATA-16 SYSDATA#15 SYSADDIN#13 SADDIN-14
Q37 SYSDATA#16 SYSADDIN#14 AN31
SDATA-17 Q35 HEATSINK
SDATA-18 SYSDATA#17 1001123
N37 SYSDATA#18
SDATA-19 J33 E3 SADDOUTCLK- AVC
SYSDATA#19 SYSADDOUTCLK# SADDOUTCLK-
SDATA-20 G33 S7YBJ00001
SDATA-21 SYSDATA#20
G37 SYSDATA#21 SYSADDOUT#0 J1
SDATA-22 E37 J3
SDATA-23 SYSDATA#22 VID[4:0] VCC_CORE VID[4:0] VCC_CORE SYSADDOUT#1 SADDOUT-2
G35 SYSDATA#23 SYSADDOUT#2 C7
SDATA-24 Q33 A7 SADDOUT-3
SDATA-25 SYSDATA#24 SYSADDOUT#3 SADDOUT-4
N33 SYSDATA#25 SYSADDOUT#4 E5
SDATA-26 L33 00000 1.850 10000 1.450 A5 SADDOUT-5
SYSDATA#26 SYSADDOUT#5
C SDATA-27
SDATA-28
N35
L37
SYSDATA#27 00001 1.825 10001 1.425 SYSADDOUT#6 E7
C1
SADDOUT-6
SADDOUT-7 C
SDATA-29 SYSDATA#28 SYSADDOUT#7 SADDOUT-8
J37 SYSDATA#29 SYSADDOUT#8 C5
SDATA-30 A37 00010 1.800 10010 1.400 C3 SADDOUT-9
SDATA-31 SYSDATA#30 SYSADDOUT#9 SADDOUT-10
E35 SYSDATA#31 SYSADDOUT#10 G1
SDATA-32 E31 00011 1.775 10011 1.375 E1 SADDOUT-11
SDATA-33 SYSDATA#32 SYSADDOUT#11 SADDOUT-12
E29 SYSDATA#33 SYSADDOUT#12 A3
SDATA-34 A27 00100 1.750 10100 1.350 G5 SADDOUT-13
SDATA-35 SYSDATA#34 SYSADDOUT#13 SADDOUT-14
A25 SYSDATA#35 SYSADDOUT#14 G3
SDATA-36 E21 00101 1.725 10101 1.325
SDATA-37 SYSDATA#36
C23 SYSDATA#37
SDATA-38 C27 00110 1.700 10110 1.300 W33 DAINCLK-0
SDATA-39 SYSDATA#38 SYSDATAINCLK#0 DAINCLK-1
A23 SYSDATA#39 SYSDATAINCLK#1 J35