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Schematic Diagrams
B - 18 VT8237A-3
B.Schematic Diagrams
VT8237A-3
Sheet 17 of 40
VT8237A-3
UPSTB#7
GHI
R318 10K_06
JBAT1
CON2_BAT
1
2
1
2
H_IGNNE# 3
MD I O
SEECLK
VPAR
C481
.1U_50V_06
32KHZX2
TXEN
R580
*100K_04
H_A20M# 3
VCCRTC
Z1702
C469
1U_10V_06
3.3VS
R555 33_1%_06
ALL_PWROK
2.5VSBPLL
VLAD3
2.5V
H_SMI# 3
C404
.1U_50V_06
LPC_DRQ#1
NC_CPPE#
SEEDO
VCCRTC
RXD3 21
C468
.1U_50V_06
R630 1K_06
VBE#7
Z1703
R267 360_1%_06
RXCLK 21
SEECS
DPRSLPVR
D39
RB751V
A C
VLAD[0..7]7
Z1716
PM_DPRSLPVR 3,31
DPRSLPVR
H_INIT# 3
VCLK_SB2
C484
12P_50V_06
SATA_LED# 28
LPC_FRAME#20,23,25
VCCRTC
R587 33_1%_06
3.3V
Z1706
R279
1.05K_1%_06
2.5VS
Z1711
Z1705
C374
4.7U_10V_08
AGP_BUSY# 8
H_INTR 3
2.5VSBPLL
C489
.1U_16V_04
APICCLK1 DEL
R248 DEL
C960125
MDC 21
COL 21
TXD2 21
C706
10U_10V_08
VLAD0
Z1713
MDIO
C403
.1U_50V_06
R359
10K_06
GHI
VLAD5
R716 1K_06
RSMRST#16,23
C439
4.7U_10V_08
VT8237R plus=> 10PF
VT8237A => 12PF
AP339A
Z1704
2.5VS
DNSTB7
Z1707
R325 2.2_08
H_FERR# 3
RXD0 21
LVREF_SB
3.3V
LPC_AD[3:0]
Z1708
RXDV 21
RXD2 21
32KHZX1
API CD1
LPC_AD3
EEPROM
2.5VS
H_NMI 3
J1
JOPEN
21
32KHZX1
D37
RB751V
A C
SPCLK
LPC_AD2
BGA6C
VT8237A-BGA541
H25
G26
K26
J23
F26
G25
K22
K24
A11
B11
B9
B10
A10
C11
C10
A9
A7
B7
C7
B8
D8
C9
D10
A8
D11
B12
A12
C12
E7
T22
U22
E24
G23
L26
L25
E26
E25
L24
M26
H22
K23
K25
J26
J24
H26
H24
J22
E6
E11
E9
E10
AF4
L22
D9
P11
P12
P13
P14
P15
P16
R11
R15
R14
R13
R12
R16
R21
T11
T12
T16
T15
T14
T13
M24
N21
N22
N23
N24
N25
N26
P22
P23
P24
P25
P26
M21
M22
M23
AE4
AF3
AE6
AF6
C8
D12
E12
L21
K21
AD8
AF7
AE7
AD7
G24
F24
AE8
D7
AC5
AD4
U24
U26
T24
R26
T25
T26
U25
R24
V26
R22
P21
R23
U23
R25
T23
AC9
AC8
AB9
AD10
M25
L23
L19
M19
N19
P19AA21
AB19
AB22
AB25
AC18
AE17
W22
W25
AE19
AE22
AE25
AA9
T21
AA10
AB18
K19
F23
G22
F8
VAD00
VAD01
VAD02
VAD03
VAD04
VAD05
VAD06
VAD07
MCRS
MCOL
MTXD2
MTXD1
MTXD0
MTXENA
MTXCLK
MTXD3
MDCK
MDI O
MRXD3
MRXD1
MRXDV
MRXCLK
MRXERR
MRXD2
EECS
EED O
EEDI/EEDI*
EECK
LANVCC
PLLVCC
PLLGN D
VAD08
VAD09
VAD10
VAD11
VAD12
VAD13
VAD14
VAD15
VLVREF
UPCMD
DNCMD
UPSTB+
UPSTB-
DNSTB+
DNSTB-
VLCOMP
LANGND
MIIVCC4
MIIVCC2
MIIVCC3
VBAT
VCLK
MIIVCC1
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
VCCVK18
VCCVK4
VCCVK5
VCCVK6
VCCVK7
VCCVK8
VCCVK9
VCCVK10
VCCVK11
VCCVK12
VCCVK13
VCCVK14
VCCVK15
VCCVK16
VCCVK17
RTCX1
RTCX2
LREQ0
LFRM
MRXD0
MIIVCC25-1
MIIVCC25-2
VCCVK3
VCCVK2
LAD0
LAD1
LAD2
LAD3
VBE
VPAR
LREQ1
PHYRST
PWRGD
RSMRST
FERR
A20M
IGNNE
INIT
INTR
NMI
SMI
STPCLK
SLP
GHI/GPI22/GPO22
DPSLP/GPI23/GPO23
PCICLK
APICCLK,GPI19
APICD0/GPIO10
APICD1/GPIO11
VGATE/GPIO8
GPI28/GPO28/VIDSEL/SATALED,GPI28/GPO28/VIDSEL
VRDPSLP/GPI29/GPO29
AGPBZ/GPI06
VCCVK19
VCCVK1
VCCVK20
VCCVK21
VCCVK22
VCCVK23GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
NC1
NC2
NC,PHYPWRDN
CRS 21
UPSTB7
VCOMPP
RXD1 21
DNSTB#7
H_STPCLK# 3
TXEN 21
LVREF_SB
VDD3
2.5V
AGP_BUSY#
C479
12P_50V_06
SEEC LK
3.3VS
C475
1U_10V_06
C445
.1U_50V_06
R277
*33_06
RXER 21
VLAD1
R559 0_04
LPC_FRAME#
R578 4.7K_04
SEEDO
SEEDI
VLAD4
API CD0
DNCMD7
VGATE
R569 33_1%_06
Q21
2N3904
B
E C
APICD0
ALL_PWROK3,15,24
GND_SBPLL
SEED I
R282 360_1%_06
SATA_LED#
VCOMPP
3.3VS
VLAD7
3.3V
ALL_PWROK3,15,24
S11 S121
C405
.1U_50V_06
FB12
HCB2012KF-121T30_08
C702
10U_10V_08
Near to
South
Bridge
2.5VS
C419
*10P_50V_06
R563 33_1%_06
R340
10K_06
TXD1 21
NC_CPPE# 20
2.5VS
APICD1
R567 4.7K_04
Y2
32.768KHZ
1
3
2
4
GND_SBPLL
VPAR8
VLAD[0..7]
LPC_DRQ#0
LPC_DRQ#1
C377
1U_10V_06
Q20
DTC114EUA
CE
B
LVREF_SB= 0.3V FOR VT8237R plus
LVREF_SB=0.45V FOR VT8237A
R588 33_1%_06
R275 1K_06
2.5VS
TXCLK 21
Z1709
40mil
VCCRTC
R261 360_1%_06
VGATE
R610
1.5K_04
SPC LK 2
Z1710
R551 33_1%_06
U11
CAT93C46S-26490T
3
2
1
4
8
5
6 7
DI
SK
CS
DO
VCC
GND
NC1 NC2
SEED I 16
-PH YRST 21
R263 4. 7K_06
R570 *4.7K_04
C448
.1U_50V_06
Must use +3.3VSUS if it want to wake
on LAN from resume function well.
Z1701
Z1714
32KHZX2
R558 4.7K_04
2.5VS
VLAD6
R313 33_1%_06
DEL GHL PULL UP RESISTER
H_PWRGD 3
TXD3 21
LPC_AD0
GND_SBPLL
R564 4.7K_06
MDIO 21
F0123-03
-PHYPWRDN 21
SEEC S
2.5VS
H_DPSLP# 3
R281
4.7K_06
TXD0 21
UPCMD7
LPC_DRQ#0
VLAD2
40mil
2.5VSBPLL
SPCLK
AGP_BUSY#
R717
1K_06
PM_DPRSLPVR
LPC_AD[3:0]20,23,25
DPRSLPVR
Z1715
ADD 1K*2 FOR CMOS LOST
C960130
LPC_AD1
1.05VS
H_CPUSLP# 3,5
ADD GND SHIELD