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5 4 3 2 1
GIGABYTE GA-K8U-939
REV:1.0 DATE: 94/03/25
Schematics
SHEET TITLE SHEET TITLE
D D
1 COVER SHEET
2 BOM & PCB MODIFY HISTORY
3 BLOCK DIAGRAM
4,5,6,7 AMD K8_939
8 ~ 13 ULI M1689 SINGLE CHIP
14 CLOCK GENERATOR
DDR SDRAM DIMMS 1,2,3,4 & DDR
15,16,17
C
Termination C
18 AGP SLOT
19,20 PCI SLOT 1,2,3,4,5
21 IDE , FRONT USB , SATA
22 SMSC LPC I/O
23 BIOS & FDD
24 AUDIO AC97
25 AUDIO JACK & GAMEPORT
B B
26 COM,PRT,KB/MS
27 RTL8100C & USB CONNECTOR
28 VCORE (PWM ISL6568CR)
29 FRONT PANEL
30 VCC12,VCC18,VCC25,VDDQ
31 ATX, DC POWER
COMPONENT SIDE
(0.5 oz. Copper)
GND SIDE
32 DDR POWER(5VDUAL,3VDUAL,25VSTR,VTTDDR) (1 oz. Copper)
VCC SIDE
A (1 oz. Copper) A
SOLDER SIDE
33 POWER SEQUENCE (0.5 oz. Copper)
34 R_USB , RESET GIGABYTE
Title
COVER SHEET
35 H/W SETTING Size Document Number Rev
Custom 1.0
GA-K8U-939
Date: Wednesday, June 22, 2005 Sheet 1 of 35
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GA-K8U-939 REV. 1.0 ULi M1689 single chip FOR AMD K8_939
Component value change history Circuit or PCB layout change for next version
Date Change Item Reason Date Change Item Reason
R255 change to 47K/6 , R256 change to com port loop back tool cause RI
D 94/02/05 49.9K/6/1 , C304 change to 2.2U/6/y/6.3v power on when power off
D
94/03/25 Remove C271
DR30 change to 15.4K/6/1
For the Vcore loadline finetune For realibility ,Saving space for DDRVTT
94/02/25 DR24,DR11 change to 2.4K/6/1 Remove U17,R374,R373,R414 to CPU by reduce the reverse power
94/03/25
,R376,R375,C281,Q71,URN1 sequence circuit.
Remove R299,Q33,RN84,R296,Q31,Q32,EC54 For the CPU FAN alwass keep max 94/03/25 Add R455 Connect -RSMRST to -THRMTRIP_NB by R455 to fix the
94/03/25 speed,even boot fail M1689 thermtrip issue
Add R297 0/6
Add EC61 1000u/6.3V Reverse for the 25VSTR & DDRVTT for higher CPU to
94/03/25 footprint , colay with EC43 reduce ripple.
SATA realibility can be fixed by
94/03/25 Remove EC42 BIOS , EC42 can be remove. .
To fix the ULI M1689 thermaltrip#
94/03/25 Add R455 0/6 function fail as boot fail .
Remove EC43 , add EC61
94/03/25 Remove EC43 , add EC61 to reduce 3VSTR ripple
RN95,RN96,RN97,RN98,RN99,RN100,RN101,RN102
RN103,RN104,RN105,RN106,RN107,RN108,RN109
RN110,RN111,RN112,RN113,RN114, RN115,RN116 change to 56 ohm from
C C
94/03/25 RN117,RN118,RN119,RN120,RN121,RN122,RN123 47 ohm for the
compability
RN124,RN125,RN126,RN127,RN128,RN129,RN130
RN131,RN132,RN133,RN134, RN135,RN136,
RN137,RN138,RN139,RN140,RN141,RN142,RN143
RN144,RN145,RN146,RN147,RN148,RN149
RN150,RN151,RN152
DR11 , DR24 change to 4.99K/6/1 ,
94/04/25 DR30 change to 10k/6/1 , DR29 For CPU PWM fine tune
change to 3K/6/1, DC8 change to
100pf
94/04/25 Remove DR28 For CPU PWM fine tune
U1 change to FSB 1GHz from FSB Form 3800+ CG in high temperature
94/04/25 800MHz burn in issue
B B
A A
GIGABYTE
Title
BOM & PCB MODIFY HISTORY
Size Document Number Rev
Custom 1.0
GA-K8U-939
Date: Wednesday, June 22, 2005 Sheet 2 of 35
5 4 3 2 1
5 4 3 2 1
GA-K8U-939 BLOCK CPUCLKT
CPUCLKC
USBCLK
DIAGRAMSystem Block Diagram CLK66
SMBDAT
SMBCLK
D DDR SDRAM CLOCK D
AMD K8 939 CH 1 GEN
LANCLK
DIMM1,3 Rtt RTM360-803
FWH33
25VSTR=2.5V SSTL-2 /
VCC12=1.2V 25VDDA=2.5V DDRVREF=1.25V PCICLK_F
VCC25=2.5V VTTDDR=1.25V P.15 Termination ICS950405 SB14CLK
25VSTR=2.5V CPUVREF=1.25V PCICLK0
HT12B=1.2V
25VSTR=2.5V PCICLK1 AUDIO14
P.4,5,6,7 VTTDDR=1.25V
CH 2 P.17 PCICLK2
DIMM2,4 LPC14CLK
PCICLK3
25VSTR=2.5V
LDT DDRVREF=1.25V
P.15
PCICLK4
LINK LPC33 P.14
AGP 8X SLOT
VDDQ=1.5V
GVREF_CG=0.35V or 0.75V
C P.18 ULI M1689 C
VCC12=1.2V
VDDQ=1.5V
PCI SLOT 1~5 IDE 1,2 (ATA133)
P.19,20 VCC18=1.8V P.21
3VDUAL=3.3V
REAR USB2.0 X4 18VSB=1.8V
SATA 1,2
FUSEPWR=5V VCC3=3.3V P.21
P.27,34
RTCVDD=3V
FRONT USB2.0 X4
FUSEPWR1=5V Analog Out
P.21
AVDD=5V
P.25
LAN RTL8100C AC'97_ALC 850
B VDD25=2.5V AVDD33=3.3V Analog In B
P.27 AVDD=5V
P.8,9,10 P.24 AVDD=5V
P.25
P.11,12,13
3D Audio Out
LPC
AVDD=5V
Bus P.25
SMSC VOLTAGE MONITOR SPDIF
P.22
LPC47M997 P.25
TEMPERATURE MONITOR
FWH 5VSB=5V P.22
BIOS P.22
P.23
A A
IR SERIAL PARALLEL FLOPPY GAME PORT KEYBOARD/MOUSE
P.22 P.26 P.26 P.23 P.23
5VDUAL=5V
FUSEVCC=5V GIGABYTE
P.26 Title
BLOCK DIAGRAM
Size Document Number Rev
Custom 1.0
GA-K8U-939
Date: Wednesday, June 22, 2005 Sheet 3 of 35
5 4 3 2 1
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L0_CADIN_H[0..7]
L0_CADIN_H[7..0] (8)
L0_CADOUT_H[7..0]
L0_CADOUT_H[7..0] (8) Near Clawhammer HT
L0_CADOUT_L[7..0]
CPU side
Interface
L0_CADIN_L[0..7] L0_CADOUT_L[7..0] (8)
L0_CADIN_L[7..0] (8)
VCORE HT12B
L0_CADOUT_H[15..8]
L0_CADOUT_H[15..8] (8)
L0_CADOUT_L[15..8]
L0_CADOUT_L[15..8] (8)
AC11
AC13
AC15
AC17
AC19
AD10
AD12
AD14
AD16
AD18
AA11
AA13
AA15
AA17
AA19
AA21
AB10
AB12
AB14
AB16
AB18
AB20
AE11
AJ11
AC9
AD2
AD6
AD8
AA4
AA7
AA9
AB6
AB8
AE4
AE7
AE9
AK5
AK7
AK9
HT12B C305 SC33
VCC12 SOCKET_939A 10U/8/X5/6.3V 0.22U/4/X5/6.3V
VDD1
VDD2
VDD3
VDD4
VDD5
VDD6
VDD7
VDD8
VDD9
VDD10
VDD11
VDD12
VDD13
VDD14
VDD15
VDD16
VDD17
VDD18
VDD19
VDD20
VDD21
VDD22
VDD23
VDD24
VDD25
VDD26
VDD27
VDD28
VDD29
VDD30
VDD31
VDD32
VDD33
VDD34
VDD35
VDD36
VDD37
VDD38
VDD39
HT12B E2 AG4
VLDT_06 VLDT_08
D E1 VLDT_05 VLDT_07 AG3 D
F1 VLDT_02 VLDT_04 AG1
F2 VLDT_01 VLDT_03 AG2
R1 49.9/6/1 L0_CADIN_H15 R5 V4 L0_CADOUT_H15
R2 49.9/6/1 L0_CADIN_L15 L0_CADIN_H15 L0_CADOUT_H15 L0_CADOUT_L15
T5 L0_CADIN_L15 L0_CADOUT_L15 V3
R3 49.9/6/1 L0_CADIN_H14 P3 Y5 L0_CADOUT_H14
R4 49.9/6/1 L0_CADIN_L14 L0_CADIN_H14 L0_CADOUT_H14 L0_CADOUT_L14
P4 L0_CADIN_L14 L0_CADOUT_L14 W5
R5 49.9/6/1 L0_CADIN_H13 N5 Y4 L0_CADOUT_H13
R6 49.9/6/1 L0_CADIN_L13 L0_CADIN_H13 L0_CADOUT_H13 L0_CADOUT_L13
P5 L0_CADIN_L13 L0_CADOUT_L13 Y3
R7 49.9/6/1 L0_CADIN_H12 M3 AB5 L0_CADOUT_H12
R8 49.9/6/1 L0_CADIN_L12 L0_CADIN_H12 L0_CADOUT_H12 L0_CADOUT_L12
M4 L0_CADIN_L12 L0_CADOUT_L12 AA5
R9 49.9/6/1 L0_CADIN_H11 K3 AD5 L0_CADOUT_H11
R10 49.9/6/1 L0_CADIN_L11 L0_CADIN_H11 L0_CADOUT_H11 L0_CADOUT_L11
K4 L0_CADIN_L11 L0_CADOUT_L11 AC5
R11 49.9/6/1 L0_CADIN_H10 J5 AD4 L0_CADOUT_H10
R12 49.9/6/1 L0_CADIN_L10 L0_CADIN_H10 L0_CADOUT_H10 L0_CADOUT_L10
K5 L0_CADIN_L10 L0_CADOUT_L10 AD3
R13 49.9/6/1 L0_CADIN_H9 H3 AF5 L0_CADOUT_H9
R14 49.9/6/1 L0_CADIN_L9 L0_CADIN_H9 L0_CADOUT_H9 L0_CADOUT_L9
H4 L0_CADIN_L9 L0_CADOUT_L9 AE5
R15 49.9/6/1 L0_CADIN_H8 G5 AF4 L0_CADOUT_H8
R16 49.9/6/1 L0_CADIN_L8 L0_CADIN_H8 L0_CADOUT_H8 L0_CADOUT_L8
H5 L0_CADIN_L8 L0_CADOUT_L8 AF3
L0_CADIN_H7 R3 V1 L0_CADOUT_H7
L0_CADIN_L7 L0_CADIN_H7 L0_CADOUT_H7 L0_CADOUT_L7
R2 L0_CADIN_L7 L0_CADOUT_L7 U1
L0_CADIN_H6 N1 W2 L0_CADOUT_H6
L0_CADIN_L6 L0_CADIN_H6 L0_CADOUT_H6 L0_CADOUT_L6
P1 L0_CADIN_L6 L0_CADOUT_L6 W3
L0_CADIN_H5 N3 Y1 L0_CADOUT_H5
L0_CADIN_L5 L0_CADIN_H5 L0_CADOUT_H5 L0_CADOUT_L5
N2 L0_CADIN_L5 L0_CADOUT_L5 W1
L0_CADIN_H4 L1 AA2 L0_CADOUT_H4
L0_CADIN_L4 L0_CADIN_H4 L0_CADOUT_H4 L0_CADOUT_L4
M1 L0_CADIN_L4 L0_CADOUT_L4 AA3
L0_CADIN_H3 J1 AC2 L0_CADOUT_H3 SOCKET_939E
L0_CADIN_L3 L0_CADIN_H3 L0_CADOUT_H3 L0_CADOUT_L3
K1 L0_CADIN_L3 L0_CADOUT_L3 AC3
C L0_CADIN_H2 J3 AD1 L0_CADOUT_H2 J22 R12 C
L0_CADIN_L2 L0_CADIN_H2 L0_CADOUT_H2 L0_CADOUT_L2 VSS147 VSS209
J2 L0_CADIN_L2 L0_CADOUT_L2 AC1 J24 VSS148 VSS210 R14
HT12B L0_CADIN_H1 G1 AE2 L0_CADOUT_H1 K2 R16
L0_CADIN_L1
L0_CADIN_H1 L0_CADOUT_H1 L0_CADOUT_L1 VSS149 VSS211
H1 L0_CADIN_L1 L0_CADOUT_L1 AE3 K7 VSS150 VSS212 R18
L0_CADIN_H0 G3 AF1 L0_CADOUT_H0 K9 R20
L0_CADIN_L0
L0_CADIN_H0 L0_CADOUT_H0 L0_CADOUT_L0 VSS151 VSS213
G2 L0_CADIN_L0 L0_CADOUT_L0 AE1 K11 VSS152 VSS214 R22
K13 VSS153 VSS215 R24
K15 VSS154 VSS216 T7
R17 49.9/6/1 L5 AB4 K17 T9
R18 49.9/6/1 L0_CLKIN_H1 L0_CLKOUT_H1 L0_CLKOUT_H1 (8) VSS155 VSS217
M5 L0_CLKIN_L1 L0_CLKOUT_L1 AB3 L0_CLKOUT_L1 (8) K19 VSS156 VSS218 T11
(8) L0_CLKIN_H0 L3 L0_CLKIN_H0 L0_CLKOUT_H0 AB1 L0_CLKOUT_H0 (8) K21 VSS157 VSS219 T13
L2 L0_CLKIN_L0 L0_CLKOUT_L0 AA1 K23 VSS158 VSS220 T15
(8) L0_CLKIN_L0 L0_CLKOUT_L0 (8)
K26 VSS159 VSS221 T17
K28 VSS160 VSS222 T19
(8) L0_CTLIN_H0 R1 L0_CTLIN_H0 L0_CTLOUT_H0 U2 L4 VSS161 VSS223 T21
L0_CTLOUT_H0 (8)
(8) L0_CTLIN_L0 T1 L0_CTLIN_L0 L0_CTLOUT_L0 U3 L6 VSS162 VSS224 T23
L0_CTLOUT_L0 (8)
L8 VSS163 VSS225 T26
L10 VSS164 VSS226 T28
AE22 FREE1 L12 VSS165 VSS227 U6
AG22 FREE2 FREE22 AL9 L14 VSS166 VSS228 U8
AH8 FREE3 FREE23 AL10 L16 VSS167 VSS229 U10
AH29 FREE4 FREE24 AL11 L18 VSS168 VSS230 U12
AJ4 FREE5 FREE25 AL12 L20 VSS169 VSS231 U14
AJ5 FREE6 FREE26 C22 L22 VSS170 VSS232 U16
AJ6 FREE7 FREE27 C28 L24 VSS171 VSS233 U18
AJ7 FREE8 FREE28 D8 M7 VSS172 VSS234 U20
AJ8 FREE9 FREE29 D11 M9 VSS173 VSS235 U22
AJ22 FREE10 FREE30 D12 M11 VSS174 VSS236 U24
AJ28 FREE11 FREE31 D29 M13 VSS175 VSS237 V2
COUPON1 COUPON1 1 2 COUPON/X AK3 E21 M15 V7
COUPON2 COUPON2 1 FREE12 FREE32 VSS176 VSS238
2 COUPON/X AK4 FREE13 FREE33 E22 M17 VSS177 VSS239 V9
B VCC B
AK6 FREE14 FREE34 G15 M19 VSS178 VSS240 V11
IMPEDENCE TESTING COUPON AK8
AK10
FREE15 FREE35 N27
T25
M21
M23
VSS179 VSS241 V13
V15
FREE16 FREE36 VSS180 VSS242
AK12 FREE17 FREE37 T29 M26 VSS181 VSS243 V17
AL3 FREE18 FREE38 U28 M28 VSS182 VSS244 V19
AL4 FREE19 FREE39 C11 N6 VSS183 VSS245 V21
AL5 FREE20 FREE40 AG15 N8 VSS184 VSS246 V23
AL6 FREE21 FREE41 AH12 N10 VSS185 VSS247 V26
VCORE VCORE N12 V28
VSS186 VSS248
N14 VSS187 VSS249 W4
AK11 VDD40 VDD63 J17 N16 VSS188 VSS250 W6
B5 VDD41 VDD64 J19 N18 VSS189 VSS251 W8
B10 VDD42 VDD65 K6 N20 VSS190 VSS252 W10
VCC12 VCC12 B12 K8 N22 W12
VDD43 VDD66 VSS191 VSS253
D10 VDD44 VDD67 K10 N24 VSS192 VSS254 W14
G7 VDD45 VDD68 K12 P2 VSS193 VSS255 W16
G9 VDD46 VDD69 K14 P7 VSS194 VSS256 W18
G11 VDD47 VDD70 K16 P9 VSS195 VSS257 W20
C306 C307 C308 G13 K18 P11 W22
10U/8/X5/6.3V/X 22U/12/Y/10V 3.3N/4/X/50V/X VDD48 VDD71 VSS196 VSS258
H2 VDD49 VDD72 K20 P13 VSS197 VSS259 W24
H6 VDD50 VDD73 L7 P15 VSS198 VSS260 Y7
H8 VDD51 VDD74 L9 P17 VSS199 VSS261 Y9
H10 VDD52 VDD75 L11 P19 VSS200 VSS262 Y11
Near CPU side H12
H14
VDD53
VDD54
VDD76
VDD77
L13
L15
P21
P23
VSS201
VSS202
VSS263
VSS264
Y13
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