
W81E381D/W81E381AD
Publication Release Date: January 2002
- 62 - Revision 0.52
8.2 W81E381AD reference schematic
E381 General ref sch - 100 LQFP
Custom
0.1
Size
1
1
Friday, August 31, 2001
Document Number
Rev
Date:
Sheet
of
DVDD
AVDD
DVDD
DVDD
DVDD
DVDD
DVDD
SC-5V
SC-5V
DVDD
AVDD
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
AVSS
V3.3
DVSS
DVDD
P1.2
USBDP
USBDM
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
DVDD
USBDM
USBDP
SDA
SCL
P1.3
XI
XO
SOFTCNEN
TESTENB
PLLEN
XCVREN
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
RST
PSEN
ALE
/EA
UC51EN
UC_XO
UC_XI
P1.6
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
SCIO
SCCLK
SCRST
SCPWR
SCPRSNT
P1.0
SCC4
P3.0
P1.1
SCC8
P3.1
RST
P0.0
P0.2
P0.4
P0.6
P0.1
P0.3
P0.5
P0.7
DVSS
AVSS
P2.0
P2.2
P2.4
P2.6
P2.1
P2.3
P2.5
P2.7
SCPWR
UC_XO
XO
SC-5V
SCRST
SCCLK
SCC4
SCGND
SCC6
UC_XI
XI
P1.0
P1.6
P1.2
P1.4
P1.6
P1.1
P1.3
P1.5
P1.7
SCIO
SCC8
SCPRSNT
P3.0
P3.2
P3.4
P3.6
P3.1
P3.3
P3.5
P3.7
U1
W381-100LQFP
1
2
3
6
37
38
81
82
93
94
14
15
29
31
32
33
16
18
19
26
27
43
51
52
41
42
55
56
57
59
60
84
68
69
35
36
88
89
90
91
4
5
8
9
79
80
11
12
53
95
61
39
86
96
97
45
46
63
64
65
66
83
AVDD
AVSS
V33GND
V33
DVSS
DVDD
DVSS
DVDD
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
USBDP
USBDM
SDA
SCL
XTAL-I
XTAL-O
SOFTCNEN
TESTENB
PLLEN
XCVREN
RST
PSEN
ALE
/EA
UC51EN
UC_XO
UC_XI
SCIO
SCCLK
SCRST
SCPWR
SCPRSNT
C5
15p
C4
15p
R9
4.7K
+
C2
10u
R3
30
30
R4
C14
0.1u
C15
0.1u
C16
0.1u
WINBOND ELECTRONICS CORP.
R1
7.5K
JP3
HEADER 4X2
1
3
5
7
2
4
6
8
JP4
HEADER 4X2
1
3
5
7
2
4
6
8
JP5
HEADER 4X2
1
3
5
7
2
4
6
8
JP6
HEADER 4X2
1
3
5
7
2
4
6
8
U2
SC-SOCKET
1
2
3
4
5
6
7
8
9
10
SCPWR
SCRST
SCCLK
SCC4
SCGND
SCC6
SCIO
SCC8
9
10
D3
LED
2
1
C7
0.1u
R15
Ru
R17
Ru
R14
Ru
R16
Ru
R18
10K
SW SPST
R13
470
+
C8
10u
Y2
6MHz
C11
30p
C12
30p
Y1
XMHz
C9
Xp
C10
Xp
+
C6
10u
JP2
HEADER 3X2
1
3
5
2
4
6
R12
20K
C13
30p
R6
R7
R8
100
100
100
JP1
USB-CON-B
1
2
3
4
5
6
C3
0.1u
+
C1
10u
R11
0
R10
0
Q1
MOSFET P
S1
BUTTON
D1
LED
D2
2
1
R2
330
LED
2
1
R5
330
L1
FB
L2
FB
L3
FB
L4
FB
E381 General ref sch
I/O port
SC-SOCKET
2nd Xtal source
<- Depend on
F/W choose
Default-High
Place near chip
Reserved for future use
*Ru is reserved for future using
Remote Wakeup(optional)
*P1.7 could be programed as external INT
USB/SMC Indicator(F/W optional)
External ROM & RAM
Optional