Table of Contents
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1
SA[0..23]
SA0
SA1
SA2
SA3
SA4
SA5
SA6
SA7
SA8
A
SA9
SA10
SA11
SA12
SA13
SA14
SA15
SA16
SA17
SA18
SA19
SA20
SA21
SA22
SA23
SD0
SD[0..15]
SD1
SD2
SD3
SD4
SD5
SD6
SD7
SD8
SD9
SD10
SD11
SD12
B
SD13
SD14
SD15
-DACK0
-DACK0
-DACK1
-DACK1
-DACK3
-DACK3
-DACK5
-DACK5
-DACK6
-DACK6
-DACK7
-DACK7
DREQ0
DREQ0
DREQ1
DREQ1
DREQ3
DREQ3
DREQ5
DREQ5
DREQ6
DREQ6
DREQ7
DREQ7
AEN
AEN
BALE
BALE
-SBHE
-SBHE
-REFRESH
-REFRESH
-IOR
-IOR
-IOW
-IOW
-MEMR
-MEMR
-MEMW
-MEMW
-SMEMR
C
-SMEMR
-SMEMW
-SMEMW
-IOCS16
-IOCS16
-MEMCS16
-MEMCS16
IOCHRDY
IOCHRDY
-IOCHCK
-IOCHCK
TC
TC
SIO_RES
SIO_OSC
SIO_OSC
R128
SYS_CLK
IRRX
IRRX
IRTX
IRTX
VCC3
IRQ3
IRQ3
IRQ4
IRQ4
IRQ5
IRQ5
R126
10K
IRQ7
IRQ7
R127
IRQ9
IRQ9
IRQ10
IRQ10
IRQ11
0 (OPT)
IRQ11
IRQ14
IRQ14
IRQ15
IRQ15
SLP1
D
VCC3
1
2
U20B
W1
B15
SA0
PRD0
V2
D15
SA1
PRD1
V1
A14
SA2
PRD2
U3
B14
SA3
PRD3
U2
C14
SA4
PRD4
U1
D14
SA5
PRD5
T4
E14
SA6
PRD6
T3
A13
SA7
PRD7
T2
SA8
T1
B13
SA9
ACK
R5
C13
SA10
BUSY
R4
D13
SA11
PE
R3
E13
SA12
SLCT
R2
A15
SA13
ERROR
R1
C15
SA14
PINIT
P5
C16
SA15
AUTOFD
P4
E15
SA16
SLCTIN
P3
D16
SA17
STROBE
K2
SA18
K1
A11
SA19
TXD1
J5
D11
LA20
DTR1
J4
B11
LA21
RTS1
J3
C11
LA22
CTS1
J2
C12
LA23
DSR1
A12
DCD1
Y1
E11
SD0
RI1
Y2
B12
SD1
RXD1
W2
SD2
Y3
D10
SD3
TXD2
W3
B9
SD4
DTR2
V3
E10
SD5
RTS2
Y4
A9
SD6
CTS2
W4
C10
SD7
DSR2
L5
A10
SD8
DCD2
M2
C9
SD9
RI2
M4
B10
SD10
RXD2
N1
SD11
N3
F9
SD12
VCCUSB
N5
SD13
P1
SD14
P2
SD15
L2
F8
DACK0
GNDUSB
E1
DACK1
D2
C3
DACK3
USBCLK
L4
A3
DACK5
USBP0+
M3
B3
DACK6
USBP0-
N2
C4
DACK7
USBP1+
D4
USBP1-
H3
DRQ2/OC1/SERIRQ/GPIOE
L3
G5
DRQ0
DACK2/OC0/GPIOF
E2
DRQ1
D3
A4
DRQ3
USBP2+
M1
B4
DRQ5
USBP2-
M5
B5
DRQ6
USBP3+
N4
E6
DRQ7
USBP3-
B2
E5
AEN
KBCK
H2
A5
BALE
KBDT/KBRC
F2
D5
SBHE
MSCK/IRQ1
E3
C5
REFRESH
MSDT/IRQ12
D1
IOR
C2
C1
IOW
ROMCS
U4
MEMR
V4
D9
MEMW
DRVDEN0
A1
D6
SMEMR
DRVDEN1
B1
SMEMW
F3
D7
IOCS16
INDEX
F1
E9
MEMCS16
MTR0
A2
A8
IOCHRDY
DS1
F4
B8
IOCHK/GPI0
DS0
H1
C8
TC
MTR1
J1
D8
RSTDRV
DIR
E8
STEP
E4
A7
OSC
WDATA
33
H5
B7
BCLK
WGATE
E7
TRAK00
D12
A6
IRRX/GPO15
WRTPRT
E12
B6
IRTX/GPO14
RDATA
C7
HDSEL
G4
C6
IRQ3
DSKCHG
G3
IRQ4
G2
F6
IRQ5
GND
G1
F11
IRQ6/SLPBTN
GND
F5
G6
IRQ7
GND
H4
J9
IRQ9
GND
K3
J10
IRQ10
GND
K4
J11
IRQ11
GND
L1
J12
IRQ14
GND
K5
K9
IRQ15
GND
K10
GND
T5
K11
XDIR/PCS0/GPO12
GND
U5
K12
XOE/GPO13
GND
L6
GND
F7
L9
VCC
GND
F10
L10
VCC
GND
F12
L11
VCC
GND
F13
L12
VCC
GND
F14
M9
VCC
GND
H6
M10
VCC
GND
J6
M11
VCC
GND
K6
M12
VCC
GND
M6
P6
VCC
GND
N6
R6
VCC
GND
VT82C686A-B
2
P_PRD0
P_PRD[0..7]
P_PRD1
P_PRD2
P_PRD3
P_PRD4
P_PRD5
OVER_C0
P_PRD6
P_PRD7
P_ACK
P_BUSY
P_PE
P_SLCT
P_ERROR
USBDT0-
P_INIT
USBDT0+
P_AUTOFD
P_SLCTIN
P_STROBE
TXD1
R22
TXD1
DTR1
DTR1
USB_D0+
RTS1
RTS1
0 (OPT)
CTS1
CTS1
DSR1
DSR1
R23
DCD1
DCD1
USB_D0-
RI1
RI1
0 (OPT)
RXD1
RXD1
TXD2
TXD2
DTR2
DTR2
RTS2
RTS2
CTS2
CTS2
DSR2
DSR2
DCD2
DCD2
RI2
RI2
RXD2
RXD2
VCC3
USB_VCC
L32
FB
CB19
CT41
.1u
10u
USB_GND
L30
FB
USBCLK
USBCLK
USB_DT0+
USB_DT0-
USB_DT1+
USB_DT1-
OVER_C1
OVER_C0
KB_CLK
KB_CLK
KB_DATA
J4
KB_DATA
MS_CLK
1
MS_CLK
MS_DATA
2
3
IRQ12
-ROMCS
-ROMCS
R225
4.7K
2
1
*Set INIT low active.
4
3
R125
6
5
8
7
0(OPT)
10
9
12
11
14
13
16
15
18
17
20
19
22
21
24
23
26
25
28
27
30
29
32
31
34
33
FDD1
RN23
VCC
1K 8P4R
7
8
5
6
3
4
1
2
R200
1K
3
FS1
FUSE
R41
OVER_C0
470K
R42
CM4
C72
CM3
560K
L17
.001u
1u
1u
FB
USB1
5
1
R12
0
6
2
R14
0
7
3
8
4
C21
C23
CT10
C16
.1u
100uF
.1u(OPT)
.1u(OPT)
L2
FB
USB_GND1
USB_DT0-
R25
USB_DT0+
R27
USB_DT1-
R46
USB_DT1+
R48
CP4
CP3
CP2
CP1
47p
47p
47p
47p
VCC3
VIA TECHNOLOGIES, INC.
Title
SOUTH BRIDGE VT82C686A-B
Size
Document Number
C
VT5228C (Prelimonary)
Date:
Wednesday, November 24, 1999
3
4
FS3
FUSE
R53
OVER_C1
OVER_C1
470K
R54
C80
L16
560K
.001u
FB
R13
0
USBDT1-
R15
0
USBDT1+
C22
C24
C15
CT9
.1u(OPT)
.1u
100uF
R43
.1u(OPT)
USB_D1+
0 (OPT)
R44
USB_D1-
0 (OPT)
27
USBDT0-
27
USBDT0+
27
USBDT1-
27
USBDT1+
R47
R45
R26
R24
15K
15K
15K
15K
Rev
0.1
Sheet
6
of
20
4
A
B
C
D
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