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ʹءѺ AVR : Ը ó Set OSC Fuse Bit Դ AVR ӧҹ
All Articles >> C for Microcontroller >> - ʹءѺ AVR : Ը ó Set OSC Fuse Bit Դ AVR ӧҹ
ʹءѺ AVR : Ը ó Set OSC Fuse Bit Դ AVR ӧҹӹ
ҡ 2 ҹ Fuse Bit ǢͧѺ Oscillator ӹǹ 7 bit ҡ Set դ ԴҴѺʹ ͡ʷ AVR ǹ ӧҹ …AVR ǹ¹ФѺ
ʹԸ ѺҹѺ
Һ
Ըշз AVR Ѻҹѧ ѹ˵بҡ Set Fuse Osc Bit Դ 3 Ը
1) Parallel Programmer ¶֧ ʹ IC AVR ͧ͡ Programmer ͧ
HILO ALL-11 觨ö ҧ/ Fuse Bit AVR
( ҡӧҹ ʶҹ֡ ¤Ѻ ѺѤ ᾧԹ
ЫѺ䢻ѭҹ)
2) JTAG ͧҡ JTAG ͧ Clock AVR
3) External Clock AVR Ƿջѭ ͢ͷҨҷӤ㨡ѹѺ
Ըաҧ
·任ѭҷԴѡٻẺѧѺ
- 㨼Դҧ Programmed, UnProgrammed 0 1 еͧ Click ͡
ҧ Ponyprog2000 
Һ͡ Ҥԡçͧҧ ¶֧ Fuse Bit 鹨 0 ФѺ
¶֧ SUT1 CKSEL 0 ͡ = 1
ѭ óշҵͧ XTAL 12 MHz 㨵çԴ ¤ԡ
Դ ѹҡѺ CKSEL =0000 External Clock
ҵҹ XTAL ѹӧҹ 䧴
ǧ External Clock
Ը䢻ѭ ҧǧ External Clock ¹繺á ǧôҹҧ 
ͧǧöӹǹҡôѧ仹
f = 1/(2.2CR)
f : The oscillation frequency (Hz)
C : The capacitor (F)
R : The resistor (ohm)
· Rp դҡѺ 10 Ңͧ R1 Ҩ͡դҡ 100K
Invertor Ҩ CD4069, 74LS06, 74LS14 繵
͡ Rp = 1M, R1=68 K, C1= 15pF Clock ҳ 440 KHz
û鹵䢻ѭ Set Fuse OSC Դ
ػóͧ
1) ǧ Ext. Clock Сͺ
- IC, 74LS14 1
- R, 1M 1/4W 5% 1
- R, 68K 1/4W 5% 1
- C, 15pF 50V 1
2) Proto Board, Թǧ
3) 5 Volt Power Supply
4) ͧ Pony STK200/300
5) Ponyprog2000
鹵
1) Ext Clock 440KHz
2) AVR ջѭ͡Ҩҡ Board ҵǧô Proto Board 
3) § 5VDC
4) Read Configuration and Security bits Ponyprog2000 Ҷ١ set OSC Դ˹ ?
蹨ҡҧ ҹ AVR ǹ١ Set Ext Clock 
ҡ Ponyprog Error ö Read 
ͧ Ext. Clock ҷ XTAL2 ᷹ ǡ Read ա
ҹ价 5 ѧҹʴ AVR ١ Set Fuse Ǣ Reserve ͧ¡ҹ/¹ Configuration Parallel Programmer ALL-11 ҹ ֧öѺҹ
5) ӡ Set Fuse Bit ͧ ǡ Write ˹ҵҧ Configuration and Security bits 
ͧԴ ͧ䢡ѹٹФѺ
ͧ Set AVR ӧҹ XTAL 12 MHz, Ѻʹ Fuse Դ ѡɳ Oscillator Type ҧѹ
˵ ͡Դ Ext RC OSC
ҡ AVR ӧҹ ͵ǧ XTAL 12MHz
ǧ External Clock 440 KHz
š öҹͧ ͵ǧ XTAL 12MHz
˵ ͡Դ Int RC OSC
ҡ AVR ӧҹ ͵ǧ XTAL 12MHz
ǧ External Clock 440 KHz
š öҹͧ ͵ǧ XTAL 12MHz
˵ ͡Դ Ext Clock
ҡ AVR ӧҹ ͵ǧ XTAL 12MHz
ǧ External Clock 440 KHz
š öҹͧ ͵ǧ XTAL 12MHz
䢢ͧ䢻ѭҴԸչ
ҡ÷ͧͧԸչö䢻ѭ֧ 93% ͧٻẺ͡ OSC Fuse öѭ价ӡ Fuse DataSheet к Reserve OSC Fuse Reserve § 7%ͧٻẺ Fuse ͡ ҡҾԨóҨǹ˭Ф͡óբͧ Set SUT = 11 ѧҡ Set SUT = 11 ͧͺͺ Ҩз AVR ӧҹ
ػ
öѭѺ ҹ Set Դ AVR ӧҹ ǹФѺ 㹵 ¹Ժ¡ҹ AVR աµԴ͡ѹ ¨Ѻҡûءá繪ǧ令Ѻ