ʶһѵ¡ͧ 68HC11

´ѭҳѴͧ 68HC11


ٻ 11 ʴѴͧ 68HC11 ٻ 11 () ѧẺ DIP Ҵ 48 ǹٻ 11 () ѧẺ PLCC Ҵ 52 ҧѹçӹǹͧͧǧ͡繴ԨԵẺ 48 Ẻ 52 4 ͧ ٻ 11 () Ẻ QFP Ҵ 64

§Ǵ (V dd, V ss)

Ѻçѹ 68HC11 ҹ Vdd ͧ͹çѹ +5 ŵ Vss Ǵ ͧҡ 68HC11 çҧҡػóӾǡ ѧͧѴѧҧҡ çѹ§ ͧسҾ͹ҧ çѹͧШ 0.1 ÿѴҧ Vdd Vss ͧԴШ˹ҡش

RESET

ԹѺѭҳ 68HC11 ҹѹҨԴҡѺ§ ҹ ԴҡҹǧԴԴҴ ١ǨѺǧ͵͡ ҡ ǧ͵͡͹ѭҳ еҹѭҳ͹ ͧͨԡ "0"

XTAL,EXTAL

2 ١Ѵ͡Ѻʵ ǧԴѭҳԡ ǺǧԴѭҳԡ Ի ҡ٧ E ҳ 4 ѴǧͤʵҡѺ ͧ ʴѧٻ 12 ҡǧԴѭҳԡ͡ XTAL ͧ ҹҹ 10 - 100 ŧǴ ͹ѭҳԡ EXTAL ͹ͧ٧ E ҳ 4 ѧٻ 13 ǧԴѭҳԡ ͺѿᴹ٧ 74HC04 ѺóͧǧԴѭҳԡ͹ ͧǧԴѭҳԡҡѺ͹§ 2 öѭҳ ҡ XTAL ҹҹҹ 220 EXTAL ͧ͹ա˹ ѧٻ14 աС˹ͧӹ֧֧ ͡ǧǹͧѺͧ ͧ Шʴǧٻ 12 ֧ 14 ѺԴǧ ѧ ͡ШͧŴŧҡǧʴ

E

ҵصͧǧԴѭҳԡ öҹҧԧ ͡ ҡ 1/4 ͧԹص XTAL EXTAL E ͨԡ "0" ١ѧ ҡ "1" ֧ Ѻ¡ ҡ ҡ͹ STOP ѭҳ E ͡Դ High Impedance ͧ

IRQ (Interrupt Request)

ԹصѺ¡ԹѻẺЫԧùʢͧ 68HC11 Ѻѭҳ Թѻö͡ Ѻѭҳͺŧ (Negative Edge) Ѻ÷ԡдѺ ѭҳ ˹ѺԹѻ÷ԡдѺѭҳ ҹдѺͨԡ "0" ҹͧҹҹ 4.7 ҡѺ§

XIRQ (Non-Maskable Interrupt)

ԹصѺͺѺԹѻẺ͹- ѧҡöѺ Թѻ ÷ԡдѺѭҳ ҹͨԡ "0" ͧҹҹѺ§ XIRQ ѭҳԹѻ

MODA/LIR MODB/Vstby (Mode A/load instruction register Mode B/Standby voltage)

ѧҡ͹ ( MODA MODB) ١Ѻ͡ ҹͧ 68HC11 ͡§ 1 ҡ 4 ͸Ժ ʴ͡ ҧ 2 ѧҡ͡ҹ MODA ¹ѡɳҹ LIR ᷹ ѡɳ ҵ ʴ ѴáѺ ͡տͨԡ "0" ѹ E ѭҳԡҾáͧ͡ LIR ͡տѹ ѭҳ LIR (Program debugging)

ǡѺ MODA MODB ١͡ҹ MODB ¹ ˹Թ Vstby ᷹ Թ Vstby ԹصѺçѹ ᵹ Ի ҡçѹҡçѹ§Իҳ 0.7 ŵ ˹ 256 亵ǹͨԡѺçѹҡçѹ Vdd çѹ§˹ ͧѹԻ٭ çѹ§ Ѻǹͨԡͧ˹ "0" ͹Ŵçѹ͡ҡ Vdd ͧѡ ͨԡ "0" Vdd Ѻçѹ§дѺ ٻ 15 ǧ ѡͧ 68HC11 MAX690 ẵ 4.5 ŵ Vdd MAX690 çѹҡҹҹҹ 4.7 ͹ MODB/Vstby ͧ 68HC11 öѡ

V rl V rh  (A/D Converter Reference Voltages)

ѺçѹҧԧѺǧŧѭҳ͡繴ԨԵ

STRB/R/W  (Strobe B Read/Write)

öҹ˹ Ѻҹͧ͹ ҡ 68HC11 ԧŪ ҵ STRB ¡ úѺÎડѺػó ͡쵢ҹԹصҵ

ŵʴ R/W Ǻҧͧš ʢ͡ ͨԡ "0" ١ѧ¹ŧ ʢ͡ ͨԡ "1" ʴ ѧҹ ҡ¹ҧͧ R/W ͨԡ "0" ʹ ¹

͡ҡҹ R/W Ѻ E öѭҳѺ˹ᵵԡ ͡

STRA/AS  (Strobe A Address Strobe)

ԹصѺѭҳͺͧѭҳ ѡɳҹ Ѻ˹ ҹͧ 68HC11

ѺԧŪԻ STRA úѺÎડѺػó͡ Ѻ쵢ҹԹصҵ

ŵ¹ѡɳҹҵ AS ǧŵ ѭҳšѺѭҳʹ C

ѭҳͧ

A, D E 鹡Ѻҹͧ 68HC11 68HC11 ҹ 쵷 3 ѧѡɳѭҳҹ B ١˹ ҵ ҡ 68HC11 ҹԧŪ ŵ ʹ亵٧ ǹ C Թصҵ 68HC11 ҹԧŪ ҡҹ ŵ硫 C 繺ŵ硫ҧʹ 8 ԵӡѺʢ ҧ 3 ҧػѡɳͧѭҳͧ쵷 5 쵢ͧ 68HC11
 
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