1
1
2
2
3
3
4
4
DD
CC
BB
AA
Title
NumberRevisionSize
A4
Date:2009-10-15Sheet of
File:E:\Mega8最小系统\Mega8最小系统.SchDocDrawn By:
R1
5K1
5V
XT1
XT2
Reset
C2
20P
C3
20P
Y1
8M
+
C1
4.7uF
LED1
LED2
LED3
LED4
LED5
LED6
LED7
LED8
5V
R4
1K
R5
1K
R6
1K
R7
1K
R10
1K
R11
1K
R13
1K*8
1
2
P1
R8
1K
5V VCC
7
PC6 (RESET)
1
GND
8
PB6 (XTAL1/TOSC1)
9
PB7 (XTAL2/TOSC2)
10
AVCC
20
AREF
21
GND
22
(SCK) PB5
19
(SCL/ADC5) PC5
28
(SDA/ADC4) PC4
27
(ADC3) PC3
26
(ADC2) PC2
25
(ADC1) PC1
24
(ADC0) PC0
23
PD0(RXD)
2
PD1(TXD)
3
PD2(INT0)
4
PD3(INT1)
5
PD4(XCK/T0)
6
PD5(T1)
11
PD6(AIN0)
12
PD7(AIN1)
13
(MISO) PB4
18
(MOSI/OC2) PB3
17
(SS/OC1B) PB2
16
(OC1A) PB1
15
PB0 (ICP1)
14
U1
ATmega8-8L
PD0
PD1
PD2
PD3
PD4
PD5
PD6
PD7
5V
R3
4.7K
KEY1
R2
4.7K
KEY2
PB1
5V
Q1
8050
R12
4.7K
BELL1
R9
220
1
2
P3
SCK
1 2
3 4
5 6
7 8
9 10
P2
MOSI
MISO
5V
Reset
5V
+
C4
470uF/16V
C5
104
LED9
5V
R14
1K
1 2
3 4
5 6
7 8
P4
5V
流水灯
电源滤波
电源指示
5V电源引出
蜂鸣器
按键
下载口/供电口
复位电路
晶振电路
