Service manual
Schematic Diagrams
VT8237A-2 B - 17
B.Schematic Diagrams
VT8237A-2
Sheet 16 of 41
VT8237A-2
IDE_SDD4
SUSB#
Z1609
AZ_RST#
C708
*10U_10V_08
PM_SUS_STAT#
R631 4.7K_06
2.5VS
IDE_PDA218
IDE_PDD5
GPIOC
SIO_OSC
IDE_SDD7
AC_SPKR
IDE_SDA2
0:MOBILE MODE
GPO1
IDE_SDD15
R626
10K_0 6
R360 0_04
GPIOC
IDE_PDA1
GPIOA
3. 3VS
VDDA0
Z1615
X3
25MHz
1 2
VDDA33
R286 0_06
IDE_PDD6
PM_STPPCI#
R363 *2.2K_06
0/1:Enable/disable CPU FREQ strapping
IDE_PDD9
+
C362
* 330U_6. 3V_D
U35
74AHC1G08GW
2
1
4
3
5
C696
.1U_50V_06
IDE_PDDACK#18
IDE_PDD13
IDE_SDA1
PWR_BTN#
RSMRST#17,23
Z1612
R583
100_08
R586 2.2K_06
3.3V
SMB_SBDATA
R361 *0_04
ACSY NC
0/1:Enable/disable LPC FWH command
2.5VS
2.5VS
25MHZXO_S
BGA6B
VT8237A-BGA541
AA22
Y24
AA26
AA25
AB26
AC26
AC23
AD25
AD26
AC24
AC25
AB24
AB23
AA24
Y26
AA23
W23
V25
W24
Y23
V24
W26
Y25
Y22
V22
V23
T1
U3
V2
U1
V3
T2
U2
T3
AD24
AE26
AC20
AB20
AC21
AE18
AF 18
AD18
AD19
AF 19
AE20
AF 20
AD20
AE21
AF 21
AD21
AD22
AF 22
AD17
AD23
AF 23
AE23
AF 17
AF 25
AF 26
AF 24
AC22
AE24
AD2
Y2
AA1
W4
AC1
V4
Y3
AB3
AA2
AD3
AF2
AB1
AC4
AB2
AC2
AA3
AE2
AE5
AF5
AC6
AD5
AB7
AC7
AD6
AA4
AB4
AB5
AB6
J9
J10
J11
AF14
L13
L14
AE9
AF1
L15
K9
L9
J12
L18
M9
AB14
AC14
AD12
AD13
AD14
AD15
AD16
AE12
AE14
AE16
AF12
L16
M11
AC11
AC17
AB13
AC13
AE15
AF 15
AB15
AC15
AF 16
L11
L12
T4
U4
AD9
AF8
AB8
AC3
AD1
AE1
Y4
AF9
Y1
AE3
AE13
AF 13
AC10
AB10
AE11
AF11
AD11
AE10
AF10
AC19
AB21
AB11
AB17
W12
W13
W14
W15
W16
M18
N9
N18
P9
P18
R9
R18
T9
T18
U9
U18
V9
V10
V11
V12
V13
V14
V15
V16
V17
V18
AC16
AC12
AB16
AB12
M12
M13
M14
M15
M16
N11
N12
N13
N14
N15
N16
F6
F7
J5
K5
P5
R5
W5
V5
K18
Y5
PDD00
PDD01
PDD02
PDD03
PDD04
PDD05
PDD06
PDD07
PDD08
PDD09
PDD10
PDD11
PDD12
PDD13
PDD14
PDD15
PDA0/PDA0*
PDA1/PDA1*
PDA2/PDA2*
PDDRQ
PDDACK/PDDACK*,PDDACK
PDIOR/PHDMARDY/PHSTROBE
PDIOW/ PSTOP
PDRDY/PDDMARDY/PDSTROBE
PDCS1/PDCS1*,PDCS1
PDCS3/PDCS3*
ACBITCLK,AZBITCLK
ACSDIN0,AZSDIN0
ACSDIN1,AZSDIN1
ACSDIN2,AZSDIN2/GPI20/GPO20/PCS0
ACSDIN3,AZSDIN3/GPI21/GPO21/PCS1/SLPBTN
ACSYNC,AZSYNC/ACSYNC*
ACSDOUT,AZSDOUT/ACSDOUT*
ACRST,AZRST
IRQ14
IRQ15
SDD00
SDD01
SDD02
SDD03
SDD04
SDD05
SDD06
SDD07
SDD08
SDD09
SDD10
SDD11
SDD12
SDD13
SDD14
SDD15
SDDRQ
SDDACK
SDIOR/SHDMARDY/SHSTROBE
SDIOW/ SSTOP
SDRDY/SDDMARDY/SDSTROBE
SDCS1
SDCS3
SDA0
SDA1
SDA2
PWRBTN
RING/GPI03
EXTSMI/GPI 02
PME
LID/GPI04
BATLOW/GPI05
SUSST1/GPO03
SUSCLK/GPO04
SUSA/GPO02
SUSB
SUSC
SMBALRT
SMBCK1
SMBDT1
GPI01,GPI01/THRMTRIP
GPO00
GPI00
Strap_VD 1*,GPI OA*/PCREQA*
Strap_VD 0*,GPI OC* /PC GNTA*
Strap_VD 3*,GPI OD* /PC GNTB*
Strap_VD 2*,GPI OB*/PCREQB*
PCKRUN
CPUSTP/GPO05
PCISTP/PCISTP*/GPO06
VSUS33-1
VSUS33-2
VSU S33- 3
VSUS33-4
VCC25-1
VCC25-2
VCC25-3
GNDATS11
GND
GND
TE ST
PWROK
GND
VCC25-5
VCC25-6
VCC25-4
VCC25-7
VCC25-8
GNDATS0
GNDATS1
GNDATS2
GNDATS3
GNDATS4
GNDATS5
GNDATS6
GNDATS7
GNDATS8
GNDATS9
GNDATS10
GND
GND
VCCAS2
VCCAS1
STXP1
STXN1
SRXP2
SRXN2
STXP2
STXN2
GNDATS12
GND
GND
VSU S25- 1
VSUS25-2
SERIRQ
SPKR/SPKR*
OSC
SMBCK2/GPI27/GPO27
SMBDT2/GPI26/GPO26
INTRUDER/GPI16
AOLGPI/THRM/GPI18
TPO
CPUMISS/GPI17
GPO01
SRXP1
SRXN1
VCCAO
GNDAO
VCCA33,NC
GNDA33,NC
SREXT
SXO
SXI
SVREF,NC
SCOMPP,NC
VCCAS4
VCCAS3
VDDATS-1
VDDATS-2
VDDATS-3
VDDATS-4
VDDATS-5
VCC25-9
VCC25-10
VCC25-11
VCC25-12
VCC2 5-13
VCC25-14
VCC25-15
VCC2 5-16
VCC25-17
VCC25-18
VCC2 5-19
VCC25-20
VCC25-21
VCC2 5-22
VCC25-23
VCC25-24
VCC25-25
VCC2 5-26
VCC25-27
VCC25-28
VCC2 5-29
GNDAS1
GNDAS2
GNDAS3
GNDAS4
GND
GND
GN D
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GN D
GND
GND
GND
GND
GND
GND
NC, WAKE
R316 0_06
PWR_BTN# 23
GPO0
SMB_SBDATA 2,9..11
SMB_SBCLK
INT_IRQ15
IDE_PDD15
8237_PWROK
3.3V
IDE_PDA118
SATARXP0
SMBCK2
AZ_SYNC
IDE_PDD7
RN20
2.2K_8P4R_06
1
2
3
45
6
7
8
R365 10K_06
R628 1M_06
AZ_RST#
GPI04
IDE_SDIOR#
ACSDO
SM_INTRUDER#
3.3VS
SMBDT2
IDE_SIORDY
R574 4.7K_06
R544 10K_06
0/1:Enable/disable100Mhz VLink clock(Reserved)
GPO 0 1 1
Z1611
SDIN2
R358 4.7K_06
R285
360_1%_06
3.3V
SERIRQ
IDE_PDD8
8237_PWROK
RN9
1K_8P4R_06
1
2
3
45
6
7
8
R624 4.7K_06
IDE_PDDREQ18
WAKE 7
IDE_SDD1
IDE_PDDREQ
IDE_SDD12
5VS
IDE_SDD14
Z1613
+
C805
100U_6.3V_B
12
AC_SPKR 27
PM_CLKRUN# 20,23
R656 10K_06
1:V4 support
SREXT
C434
1U_10V_06
R596 22_06
0/1:Enable/disable Auto Reboot
AZ_SDIN1
SATATXP0
GPO 04 15
GPIOB
IDE_PDD14
R351 0_06
SMBCK2
SMI#
IDE_SDD9
WAKE
IDE_SDCS1#
R581 10K_06
SMI # 23
IDE_PDD4
AZ_SDIN0
R601 4.7K_06
2.5VSATA
AZ_SDIN1
C457
4.7U_10V_08
IDE_PDCS3#18
AZ _SDOUT 27
IDE_PIORDY18
8237TEST
Z1604
SMB_SBCLK
Z1607
R622 4.7K_06
C490
4.7U_10V_08
GPIO B 0:IOQ Depth 8 Level
IDE_PDD10
SATARXP018
SATARXN0
C488 22P_50V_06
C493 22P_50V_06
3.3V
PM_SUS_S TAT#
SB_PWROK
GPO1
SUSA#
AZ_SYNC
AZ_SDOUT
IDE_PDD[0..15]18
SMBDT2
Z1616
GPI0
INT_IRQ
AZ_SDIN0
IDE_SDDREQ
RING
8237_SU SB#
R554 4.7K_06
2.5V
PM_BATLOW#
C492 22P_50V_06
R633 *2.2K_06
C381
4.7U_10V_08
GPIO D 0:AGTL+ p ull up Enable
PM_SUS_STAT# 7
SWI# 23
IDE_PDD2
IDE_SDCS3#
Z1603
C432
4.7U_10V_08
FB14
HCB3216KF-800T30_12
25MHZXI_S
IDE_PDA0
IDE_SDD11
VIA ? ?
C960329
IDE_IRQ18
PME# 19,23, 26
SATATXN0
IDE_SDD10
Z1618
3. 3VS
AZ_SDOUT
R597 4.7K_06
C447
.1U_50V_06
PM_STPPCI#
0\1:P4/V4 Bus \ C3 Bus
3.3VS
SEEDI17
AZ_SY NC
R355 *0_06
GPIO C,A 1,1:Auto Mode
VCCRTC
IDE_PDD[0..15]
IDE_PDIOW#
R324 *2.2K_06
Z1601
C487 22P_50V_06
R381 4.7K_06
Power Up Strapping for VT8237A
C452
5P_5 0V_06
IDE_SDD0
SI DEVREF
R269 0_06
IDE_PDD12
PM_CLKRUN#
GPIOA
IDE_PDCS3#
R357 *1K_06
IDE_PDCS3#
25MHZXO_S
IDE_PDCS1#
IDE_PDA1
IDE_SDD2
PME#
IDE_PIORDY
R350 2.2K_06
1:Vlink Compensation(Manual setting)
SMB_SBDATA
IDE_SDD13
R603 0_06
IDE_SDD3
SMI#
R323 1K_06
PEXMESCI#
Z1610
GPI0
GPI04
R600 4.7K_06
R535 4.7K_06
PEXMESC I# 7
2.5VSATA
INT_IRQ15
IDE_PDDACK#
R599 10K_06
R598 4.7K_06
C698
.1U_50V_06
SREXT
R353 *0_06
0:V4 support(Disable)
2.5VS
GPIOD
R347 0_06
2. 5VS
AZ _SY NC 27
RING
SDIN3
IDE_PDD0
IDE_SIORDY
+
C389
470U_4V_D
C440
.1U_50V_06
SATATXP018
IDE_PDD3
VDDA0
SB_PWROK
Z1617
PM_STPCPU#
R348 10K_06
R627 4.7K_06
R296 5.6K_06
PEXMESCI#
CPUMISS
R545 4.7K_06
AZ_SDIN1 27
8237_SU SB#
IDE_SDD5
IDE_SDIOW#
INT_IRQ
C449
.1U_50V_06
IDE_PDA2
Z1606
R293 *0_06
R632 1K_06
IDE_PDA2
R625 10K_06
R362 1K_06
FB21
HCB2012KF-121T30_08
IDE_PDD7
SUSC#
IDE_SDD7
SUSC # 23
IDE_PDIOR#18
IDE_SDD6
R366 4.7K_06
PM_STPCPU# 2
TPO
SMB_ALERT#
VKCOMP for Vlink at 4X mode
AZ_SDIN0 27
SUSB# 13, 15,20, 23,27, 33,34
Z1614
IDE_SDDACK#
C695
.1U_50V_06
C373
1U_10V_06
LAN PHY RESET:
3.3VSGPO04
U34
74AHC1G08GW
2
1
4
3
5
R368 *2.2K_06
VT8237R plus => 4.7K
VT8237A => 6.12K
AP339A
3.3V
TPO
C443
.1U_50V_06
3. 3VS
AZ_SDOUT
VDDA33
8237TEST
RN29
1K_8P4R _06
1
2
3
4 5
6
7
8
IDE_PDA018
IDE_PDCS1#18
AC_SPKR
PM_STPCPU#
R311 0_06
FB13
HCB2012KF-121T30_08
3. 3V
RSMRST#17,23
AZ_BI TCLK
SMB_ALERT#
1:VKCOMP for Vlink at 4X mode 0.9V
PM_STPPC I# 2
IDE_PDIOW#18
SERIRQ
SDIN3
PM_CLKRUN#
R308 6.19K_1%_06
R621 10K_06
3.3VS
SMB_SBCLK 2,9..11
25MHZXI_S
IDE_SDDREQ
R262 10K_06
SATARXN018
R623 *1K_06
R565 4.7K_06
3. 3VS
GPIOB
WAKE
Z1608
0/1:Disable/Enable LAN shadow EEPROM
2.5VS
IDE_PDD11
R595 22_06
R276 0_06
R619 4.7K_06
R354 *1K_06
3.3V
0:V4-lite support(Disable)
1:DESKTOP MODE
SATATXN018
IDE_PDA0
R629 1M_06
SIO_OSC 2
IDE_SDA0 PM_BATLOW#
GPO0
3. 3VS
SCI # 23
SATA 50CO MP
Z1605
Z1602
GPI04
R604 4.7K_06
AZ _RST# 27
C446
1U_10V_06
1:V4-l ite s upport
2.5VS
GPIOD
SDIN2
R264 4.7K_06
AZ _BITC LK 27
GPO 1 2 7
CPUMISS
IDE_SDD8
SM_INTRUDER#
R552 4.7K_06
SER IR Q 19, 20, 23
SUSA#
AZ_SDIN0
C456
5P_50V_06
R575 4.7K_06
SB_PW ROK 7
IDE_PDIOR#
IDE_PDD1
R364 4.7K_06
RN28
2.2K_8P4R_06
1
2
3
45
6
7
8
R620 4.7K_06
R618 22_06