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5 4 3 2 1
Revision 1.01
GA-8I845G Schematics
SHEET TITLE SHEET TITLE
D D
01 COVER SHEET 24 IDE CONNECTOR
02 BOM & PCB MODIFY HISTORY 25 PS/2 K/B & M/S
03 BLOCK DIAGRAM 26 COM & PRT PORT
04 P4_478A 27 AC97 CODEC
05 P4_478B 28 LINE OUT/IN/MIC/FRONT AUDIO & GAME
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06 P4_478C 29 VGA CONNECTOR
07 GMCH-BROOKDALE-G_A 30 MISC. PWR & ATX POWER
C C
08 GMCH-BROOKDALE-G_B 31 VCORE PWM(FAN5093)
09 GMCH-BROOKDALE-G_C 32 DDR POWER
10 DDR SERIAL TERMINATION 33 REALTEK8110C
11 DDR1 & DDR2 34 PCI ROUNTING
12 DDR3 & DDR TERM. 35 GPIO PIN LIST
13 AGP SLOT
14 ICH4_1
B B
15 ICH4_2
16 FWH
17 ICS950211AF CLOCK GEN Digitally signed by dd
DN: cn=dd, o=dd, ou=dd,
18 PCI1 & PCI2 SLOT
[email protected],
19 PCI3 & PCI4 SLOT c=US
20 PCI5 SLOT Date: 2009.10.23 06:54:35
21 LPC IO ITE 8702 & FLOPPY & FAN +07'00'
A
22 FRONT USB2.0 A
23 FRONT PANEL GIGABYTE
Title
COVER SHEET
Size Document Number Rev
Custom GA-8I845G 1.01
Date: Wednesday, June 15, 2005 Sheet 1 of 35
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Model Name: GA-8I845G Circuit or PCB layout change
Version:1.01 for next version
DATE Change Item Reason
D 2005/05/09 1.0 GERBER OUT. ( ) Modify from 8I845GE-RZ PCB Rev1.02 D
2005.05.18 1.01 GERBER OUT
Component value change history 29.3cm X 21.0cm 60+-15% C Type
DATE Change Item Reason
2005/05/09 1.0A BOM RELEASE Modify from 9MI845GERZ-00-10C
2005/05/20 1.0B BOM RELEASE NB change to 845G, VDDQ add MOS Q29 TO252, Change Q92->TO252
2005/06/01 1.0B BOM ECN RELEASE Correct Package
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2005/06/09 1.0B BOM ECN RELEASE Correct PCB vendor
2005/06/15 1.0C BOM RELEASE Add W83301 VTTDDR HIGH SIDE MOSFET GATE PD 3K
Correct Package
C C
B B
A A
GIGABYTE
Title
BOM & PCB MODIFY HISTORY
Size Document Number Rev
Custom GA-8I845G 1.01
Date: Wednesday, June 15, 2005 Sheet 2 of 35
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5 4 3 2 1
BLOCK DIAGRAM
INTEL Pentium4 (478)
D
CLOCK GENERATOR D
VID0~4
PWM/OTHER POWER
VCORE = 1.75V / SLEEP : 1.3V
VCC3 PAGE 4, 5, 6 VCORE = 1.75V (650-1100MHZ) / SLEEP : 1.3V
CKVDD = 3.3V PAGE 17 5VSB,-12V,+12V,VCC,VCC3,3VDUAL
VTT_DDR,2_5VSTR PAGE 30,31,32
GAD0~31 GMCH
ADSTB0,ADSTB0- MAA0~14
ADSTB1,ADSTB1-
BROOKDALE-G-DDR MAA_CPC1~5
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SBA0~7 MAB_CPC1~5
AGP SLOT 4X SBSTB,SBSTB- MDD0~63 DDR SDRAM DIMM X 3
-DQSD0~7
VDDQ = 1.5V (AGP POWER 4X) GCBE0~3-
VCC3 = 3.3V DM0~7
+12V = 12V ST0~2 AGP BUS
3VDUAL = 3.3V 2_5VSTR = 2.5V(MEMORY,SUSPEND POWER)
VCC = 5V PAGE 13 VCORE = 1.75V / SLEEP : 1.3V VTT_DDR = 1.25V
2_5VSTR = 2.5V(MEMORY) PAGE 10,11,12
VDDQ = 1.5V (AGP POWER 4X, HUBLINK) PAGE 7 ,8 ,9
C C
AGPUSB+ / -
HL0~10
CONTROL BUS
HUB LINK FRONT USB CONN.
PAGE
ICH4 22
IDE Primary and Secondary
REAR USB PORTS
VCC = 5V PAGE 24
VCC25 = 2.5V(I/O,MEMORY/I,VLINK/I)
VCC = 5V 3VDUAL = 3.3V(SUSPEND POWER)
5VSB = 5V VCC3 = 3.3V
AMRUSB+ / - 5VUSB = 5V PAGE 33 RTCVDD = 3.3V
PAGE 14,15 FWH
PCI BUS
VCC = 5V
B VCC3 = 3V PAGE 16 B
PCI SLOT 1,2,3,4,5
+12 = 12V
-12 = -12V
VCC = 5V
VCC3 = 3V
3VDUAL = 3V PAGE 18,19,20
REALTEK 8100C LAN LPC BUS
AC97 CODEC 9761A +12 = 12V
-12 = -12V
LPC I/O ITE8712
VCC = 5V
VCC3 = 3V
3VDUAL = 3V PAGE 18,19,20 FDD IR/CIR S_IRQ GAME
+12V = 12V AC97 LINK
VCC3 = 3.3V VCC = 5V
VCC = 5V VCC3 = 3V
AVDD = 5V PAGE 27 PAGE 21
I/O PORTS :
A AUDIO PORTS : FRONT AUDIO A
LIN_ OUT LINE_IN MIC COMA COMB LPT PS2
PAGE 26
TELE CD_IN
PAGE 28
FRONT PANEL /FANS GIGABYTE
Title
BLOCK DIAGRAM
VCC = 5V
5VSB = 5V Size Document Number Rev
+12 = 12V Custom GA-8I845G 1.01
PVCC = 5V PAGE 23
Date: Wednesday, June 15, 2005 Sheet 3 of 35
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D D
VCORE
AD11
AD19
AC18
AC16
AC14
AC12
AC10
AD17
AD15
AD13
AE18
AE16
AE14
AE12
AE10
AE20
AB15
AB13
AB11
AB19
AD9
AD7
AC8
AE8
AE6
AB9
AB7
E14
E12
E10
E20
E8
P4A
VCORE1
VCORE2
VCORE3
VCORE4
VCORE5
VCORE6
VCORE7
VCORE8
VCORE9
VCORE10
VCORE11
VCORE12
VCORE13
VCORE14
VCORE15
VCORE16
VCORE17
VCORE18
VCORE19
VCORE20
VCORE21
VCORE22
VCORE23
VCORE24
VCORE25
VCORE26
VCORE27
VCORE28
VCORE29
VCORE30
VCORE31
VCORE32
HA[3..16] VCORE
7 HA[3..16]
HA16 N5
HA15 A16
N4 A15
HA14 N2 G1 HADS-
A14 ADS HADS- 7
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HA13 M1 AC1
HA12 A13 AP0
N1 A12 AP1 V5
HA11 M4 AA3 R1 39/6/X
HA10 A11 BINIT BNR-
M3 A10 BNR G2 BNR- 7
HA9 L2
HA8 A9
M6 A8 DP3 L25
HA7 L3 K26
HA6 A7 DP2
K1 A6 DP1 K25
HA5 L6 J26
HA4 A5 DP0
K4 A4
C HA3 K2 U6 C
HADSTB0- A3 TESTHI8
7 HADSTB0- L5 ADSTB0 TESTHI9 W4
HREQ4- H3 Y3 TESTHI8_10
7 HREQ4- REQ4 TESTHI10
HREQ3- J3 H6 BR0-
7 HREQ3- REQ3 BR0 BR0- 7
HREQ2- J4
7 HREQ2- REQ2
HREQ1- K5 D2 BPRI-
7 HREQ1- REQ1 BPRI BPRI- 7
HREQ0- J1
7 HREQ0- REQ0
H5 DBSY- VCORE
DBSY DBSY- 7
AB1 E2 DEFER-
A35 DEFER DEFER- 7
Y1 H2 DRDY-
A34 DRDY DRDY- 7
W2 F3 HIT-
HA[17..31] A33 HIT HIT- 7
V3 E3 HITM-
7 HA[17..31] A32 HITM HITM- 7
HA31 U4
HA30 A31 R2 39/6/X
T5 A30 IERR AC3
HA29 W1
HA28 A29 HINIT-
R6 A28 INIT W5 HINIT- 15,16
HA27 V2
HA26 A27 HLOCK-
T4 A26 LOCK G4 HLOCK- 7
HA25 U3
HA24 A25
P6 A24 MCERR V6
HA23 U1
HA22 A23 CPURST-
T2 A22 RESET# AB25 CPURST- 7
HA21 R3 F4 RS2-
A21 RS2 RS2- 7
HA20 P4 G5 RS1-
A20 RS1 RS1- 7
HA19 P3 F1 RS0- C1
A19 RS0 RS0- 7
HA18 R2 AB2 10000P/6/X/50V/X
HA17 A18 RSP HTRDY-
T1 A17 TRDY J6 HTRDY- 7
HADSTB1- R5
7 HADSTB1- ADSTB1
GND10
GND11
GND12
GND13
GND14
GND15
GND16
GND17
GND18
GND19
GND20
GND21
GND22
GND23
GND24
GND25
GND26
GND27
GND28
GND29
GND30
GND31
GND32
GND33
GND34
GND35
GND36
GND37
GND38
GND39
GND40
GND41
GND42
GND43
GND44
GND45
GND46
GND47
GND48
GND49
GND50
GND51
GND52
GND53
GND54
GND55
GND56
GND57
GND58
GND59
GND60
GND1
GND2
GND3
GND4
GND5
GND6
GND7
GND8
GND9
B B
SK478/GD/W
AE7
AE24
AE22
AE19
AD8
AD4
AD1
AE17
AE15
AE13
AE11
AE9
AE26
AB20
W6
W3
AD14
AD12
AD10
AD23
AD21
AC17
AC15
AC13
AC11
AC9
AC7
AC5
AC2
AC25
AC22
AC19
AD18
AD16
AA4
AA1
AA23
AA19
AB18
AB16
AB14
AB12
AB10
AB8
AB6
AB3
AB24
AB21
V4
V1
V23
W24
W21
Y5
Y2
Y25
Y22
AA17
AA15
AA13
VCORE
BOOTSEL
BOOTSEL 31
BC10 BC11 BC12 BC13 BC14 BC15
10U/12/X5R/6.3V 10U/12/X5R/6.3V/X 100U/2V/SP-CAP/X 100U/2V/SP-CAP/X 10U/12/X5R/6.3V/X 10U/12/X5R/6.3V
VCORE
R3 47/6 TESTHI8_10
R4 220/6 BR0-
VCORE
R5 47/6 CPURST-
A A
BC18 BC19 BC20 BC21 BC22 BC23 BC17
100U/2V/SP-CAP/X 100U/2V/SP-CAP/X 10U/12/X5R/6.3V 10U/12/X5R/6.3V 10U/12/X5R/6.3V 10U/12/X5R/6.3V 10U/12/X5R/6.3V
Title
P4 478A
Size Document Number Rev