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參數資料
型號: W81E381
廠商: WINBOND ELECTRONICS CORP
英文描述: FULL SPEED USB INTEGRATED MICROCONTROLLER
中文描述: 全速USB集成微控制器
文件頁數: 8/63頁
文件大小: 695K
代理商: W81E381
W81E381D/W81E381AD
Publication Release Date: January 2002
Revision 0.52
- 8 -
3.1.1 48- pin LQFP package description
SYMBOL
TYPE PIN NO
DESCRIPTIONS
U
U
S
S
B
B
P
P
i
i
n
n
s
s
AV
DD
PWR
1
Analog 5V power supply
AV
SS
PWR
2
Analog 5V power ground
V33
PWR
5
USB DC power 3.3V output.
D+
I/O
3
USB signal (+)
D-
I/O
4
USB signal (-)
XTALI
I
36
Crystal input. Use 6M Hz crystal. A 6 MHz clock source may also be
used.
XTALO
O
37
Crystal output.
E
E
x
x
t
t
r
r
a
a
P
P
i
i
n
n
s
s
PLLEN
I
27
PLL enable pin; Schmitt-trigger pull up input
u
u
C
C
P
P
i
i
n
n
s
s
RVED1-3
X
21,41,
48
Reserved pins. Leave these pins floating.
RST
I L
29
RESET: A high on this pin for two machine cycles while the oscillator is
running resets the device.
P0.0
P0.7
I/O D
46,47,
8,9,
15,16,
17,18
PORT 0: Function is the same as that of the standard 8052.
P1.0
I/O
10
It is a high drive I/O pad. Used as a GPIO pin for memory-type SC
P1.1
I/O
11
It is a high drive I/O pad. Used as a GPIO pin for memory-type SC
P1.2
I/O
12
Used as a GPIO pin for memory-type SC
P1.3
I/O
13
Used as a GPIO pin for memory-type SC
P1.4
I/O
14
Used as a GPIO pin for memory-type SC
P1.5
I/O
22
Used as a GPIO pin for memory-type SC
P1.6
I/O
25
GPIO & remote wakeup pin
P1.7
I/O
26
GPIO & external interrupt pin
P2.2
I/O H
28
It’s a bi-directional I/O port with internal pull-ups. It can be programmed
to be an output-latched port like an on-chip 74373, or a buffer input
port like an on-chip 74244.
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