ATmega8 magnetometer USB mouse
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ATmega8 magnetometer USB mouse
2011-10-30
Denilson Figueiredo de Sá
ATmega8
1 2 3 4 5 6 7 8 9 10 11 12 13 14
PC6(RESET)PD0(RXD)PD1(TXD)PD2(INT0)PD3(INT1)PD4(XCK/T0)VCCGNDPB6(XTAL1/TOSC1)PB7(XTAL2/TOSC2)PD5(T1)PD6(AIN0)PD7(AIN1)PB0(ICP1)
28 27 26 25 24 23 22 21 20 19 18 17 16 15
PC5(ADC5/SCL)PC4(ADC4/SDA)PC3(ADC3)PC2(ADC2)PC1(ADC1)PC0(ADC0)GNDAREFAVCCPB5(SCK)PB4(MISO)PB3(MOSI/OC2)PB2(SS/OC1B)PB1(OC1A)
RetroAdapter V2
USB +5V
10K Ω
68 Ω
100nF
4.7µF
22pF
12MHz
22pF
3V6
D-
D+
68 Ω
3V6
1K5 Ω
USB interface
1
2
3
4
VCC
GND
↑ P1 pin 1
ICSP
↓ P1 pin 2
← P1 pin 3
→ P1 pin 4
B P1 pin 6
select P1 pin 7
Start P1 pin 9
hard-coded to GND
hard-coded to VCC
hard-coded to VCC
P2 pin 7 select
P2 pin 9 Start
not used
P2 pin 1 ↑
P2 pin 2 ↓
P2 pin 3 ←
P2 pin 4 →
P2 pin 6 B
P2 pin 8
P2 pin 5
P1 pin 8
P2 pin 5