绗叚绔?/p>
MCS-51
鐨勫畾鏃跺櫒
/
璁℃暟鍣?/p>
1.MCS-51
绯诲垪鐨?/p>
AT89C51
鍗曠墖鏈哄唴鏈夊嚑涓畾鏃?/p>
/
璁℃暟鍣紵姣忎釜瀹?/p>
/
璁?/p>
鏁板櫒鏈夊嚑绉嶅伐浣滄柟寮忥紵濡備綍閫夋嫨鍜岃瀹氾紵褰撲綔瀹氭椂鍣ㄦ垨璁℃暟鍣ㄥ簲鐢?/p>
鏃讹紝瀹冧滑鐨勯�熺巼鍒嗗埆涓烘櫠鎸鐜囩殑澶氬皯鍊嶏紵
瑙ｏ細
AT89C51
鍗曠墖鏈哄唴鏈?/p>
2
涓畾鏃?/p>
/
璁℃暟鍣紙鍗?/p>
T0
鍜?/p>
T1
锛夈�?/p>
T0
鏈夊洓绉嶅伐浣滄柟寮?/p>
(
鏂瑰紡
0
鈥?/p>
13
浣嶃�佹柟寮?/p>
1
鈥?/p>
16
浣嶃�佹柟寮?/p>
2-
鍙嚜
鍔ㄨ鍏ュ垵鍊肩殑
8
浣嶃�佹柟寮?/p>
3-
涓や釜
8
浣?/p>
)
銆?/p>
T1
鏈変笁绉嶅伐浣滄柟寮?/p>
(
涓?/p>
T0
鐩稿悓鐨勫墠涓夌
)
銆?/p>
閫夋嫨鍜岃瀹氾細閫氳繃瀵?/p>
TMOD
鐨勮缃�夋嫨锛屽叾楂樺洓浣嶉�夋嫨
T1
锛屼綆鍥涗綅
閫夋嫨
T0
銆傚叾涓?/p>
M1,M2
鐢ㄦ潵纭畾鎵�閫夌殑宸ヤ綔鏂瑰紡銆?/p>
褰撲綔瀹氭椂鍣ㄦ垨璁℃暟鍣ㄥ簲鐢ㄦ椂锛?/p>
T0
锛?/p>
T1
鐨勯�熺巼鍒嗗埆涓烘櫠鎸鐜囩殑
1/12,1/12
銆?/p>
2.
濡傛灉閲囩敤鐨勬櫠鎸鐜囦负
3MHz
锛屽畾鏃?/p>
/
璁℃暟鍣?/p>
T0
鍒嗗埆宸ヤ綔鍦ㄦ柟寮?/p>
0
銆?/p>
1
鍜?/p>
2
涓嬶紝鍏舵渶澶х殑瀹氭椂鏃堕棿鍚勪负澶氬皯锛?/p>
瑙ｏ細鑻ユ櫠鎸鐜囦负
3MHz
鏃?/p>
T=
锛?/p>
TM-TC
锛?/p>
12/fosc
锛?/p>
us
锛夊彲鐭ワ紝鑻?/p>
璁?/p>
TC=0
鏂瑰紡
0
鏃讹細
Tmax=2^13*4us=32.768ms
鏂瑰紡
1
鏃讹細
Tmax=2^16*4us=262.144ms
鏂瑰紡
2
鏃讹細
Tmax=2^8*4us=1.024ms
3.
瀹氭椂
/
璁℃暟鍣?/p>
T0
浣滀负璁℃暟鍣ㄤ娇鐢ㄦ椂锛屽叾璁℃暟棰戠巼涓嶈兘瓒呰繃鏅舵尟棰戠巼
鐨勫灏戯紵
瑙ｏ細
鐢变簬瀹氭椂
/
璁℃暟鍣?/p>
TO
浣滀负璁℃暟鍣ㄤ娇鐢ㄦ椂锛?/p>
鏄澶栭儴寮曡剼杈撳叆鐨勮剦
鍐茶繘琛岃鏁帮紝
CPU
鍦ㄦ瘡涓満鍣ㄥ懆鏈熼噰鏍蜂竴娆″紩鑴氾紝褰撳墠涓�娆￠噰鏍蜂负
楂樼數骞筹紝鍚庝竴娆￠噰鏍蜂负浣庣數骞筹紝鍒欎负涓�娆℃湁鏁堣鏁拌剦鍐诧紝鎵�浠ュ鏋滄櫠
鎸鐜囦负
fosc
锛屽垯鍏堕噰鏍烽鐜?/p>
fosc/12
锛屼袱娆￠噰鏍锋墠鑳藉喅瀹氫竴娆¤鏁?/p>
鏈夋晥锛屾墍浠ヨ鏁伴鐜囦笉鑳借秴杩?/p>
fosc/24
銆?/p>
4.
绠�鍗曡鏄庡畾鏃?/p>
/
璁℃暟鍣ㄥ湪涓嶅悓宸ヤ綔妯″紡涓嬬殑鐗圭偣銆?/p>
瑙ｏ細鏂瑰紡
0
涓?/p>
13
浣嶇殑瀹氭椂
/
璁℃暟鍣紝鐢?/p>
THx
鐨?/p>
8
浣嶅拰
TLx
鐨勪綆
5
浣嶆瀯
鎴愩�?/p>
鏂瑰紡
1
涓?/p>
16
浣嶇殑瀹氭椂
/
璁℃暟鍣?/p>
,
鐢?/p>
THx
鐨?/p>
8
浣嶅拰
TLx
鐨?/p>
8
浣嶆瀯鎴愶紝
鏂瑰紡
2
涓?/p>
8
浣嶇殑瀹氭椂
/
璁℃暟鍣紝
TLx
涓哄姞
1
璁℃暟鍣紝
THx
涓鸿鏁板垵
鍊煎瘎瀛樺櫒銆?/p>
鏂瑰紡
3
鍙兘鐢ㄤ簬
T0
锛?/p>
鏄皢
T0
鐨勪綆
8
浣嶇敤浣滀竴涓嫭绔嬬殑瀹氭椂
/
璁℃暟
鍣紝
鑰岄珮
8
浣嶇殑
TH0
鐢ㄤ綔涓�涓嫭绔嬬殑瀹氭椂鍣紝
骞跺�熺敤
T1
鐨?/p>
TR1
鍜?/p>
TF1
浣滀负楂?/p>
8
浣嶅畾鏃跺櫒鐨勫惎鍋滄帶鍒朵綅鍜屾孩鍑烘爣蹇椾綅銆?/p>