1
绗叓绔?/p>
涔犻涓庢�濊�冮
鍏稿瀷渚嬮瑙ｆ瀽
涓�銆佸～绌洪
1.
褰?/p>
8253
宸ヤ綔鍦ㄥ懆鏈熸�ф柟娉㈣緭鍑烘柟寮忔椂锛?/p>
鑻ヨ鏁板垵鍊间负鍋舵暟锛?/p>
鍒欒緭鍑?/p>
鈶?/p>
鏂?/p>
娉紝鑻ヨ鏁板垵鍊间负濂囨暟锛屽垯杈撳嚭
鈶?/p>
鏂规尝銆?/p>
鍒嗘瀽锛?/p>
8253
宸ヤ綔浜庢柟寮?/p>
3
鏃惰緭鍑鸿繛缁柟娉紝褰撹鏁板垵鍊?/p>
n
涓哄伓鏁版椂锛岃緭鍑烘柟娉㈢殑楂樸�佷綆
鐢靛钩鎸佺画鏃堕棿鍧囦负
nT
CLK
/2
锛屽綋璁℃暟鍒濆�?/p>
n
涓哄鏁版椂锛岃緭鍑烘柟娉㈢殑楂樼數骞虫寔缁椂闂翠负
(
n+1)T
CLK
/2
锛屼綆鐢靛钩鎸佺画鏃堕棿涓?/p>
(
n+1)T
CLK
/2
銆?/p>
绛旓細鈶犲绉?/p>
鈶￠潪瀵圭О
2
锛?/p>
8253
鍐呴儴瀵勫瓨鍣ㄥ湴鍧�鏈?/p>
鈶?/p>
涓?/p>
I
/
O
绔彛锛?/p>
鍏朵腑
鈶?/p>
涓槸瀹氭椂
/
璁℃暟閫?/p>
閬撶鍙ｃ�?/p>
鍒嗘瀽锛?/p>
8253
鏈変袱鏉″湴鍧�绾?/p>
A
1
銆?/p>
A
0
锛岀敤鏉ラ�変腑鐗囧唴
4
涓鍙ｏ紝鍏朵腑
3
涓槸璁℃暟閫氶亾鍦板潃銆?/p>
绛旓細鈶?/p>
4
鈶?/p>
3
3
锛?/p>
8253
鐨勮鏁伴�氶亾
0
锛堢鍙ｅ湴鍧�涓?/p>
POTR
0
锛夌敤浜庤鏁帮紝瑕佹眰璁℃弧
30
杈撳嚭涓�淇″彿锛屽亣瀹?/p>
璁℃暟鍣ㄥ伐浣滀簬
BCD
璁℃暟鏂瑰紡锛屽垯鍐欏叆璁℃暟鍒濆�肩殑鎸囦护涓?/p>
MOV
L
锛?/p>
鍜?/p>
OUT
PORT
0
锛?/p>
AL
鍒嗘瀽锛?/p>
8253
鍦ㄥ垵濮嬪寲鍐欏叆璁℃暟鍒濆�兼椂锛岃嫢閲囩敤
BCD
鐮佽鏁帮紝璁℃暟鍒濆�煎繀椤讳互璁℃暟缁撴灉
鐨勫崄杩涘埗鏁板姞涓娾�?/p>
H
鈥濊〃绀恒�備緥濡傝鏁板�间负
10
锛屽繀椤诲啓涓?/p>
10H
銆?/p>
绛旓細
30H
浜屻�侀�夋嫨棰?/p>
1
锛?/p>
8253
鐨勫摢绉嶅伐浣滄柟寮忚兘浜х敓杩炵画鏂规尝杈撳嚭锛?/p>
锛?/p>
銆?/p>
A.
鏂瑰紡
0
B.
鏂瑰紡
1
C.
鏂瑰紡
2
D.
鏂瑰紡
3
鍒嗘瀽锛?/p>
8253
鏈?/p>
6
绉嶅伐浣滄柟寮忥紝鍏朵腑浜х敓杩炵画娉㈠舰鐨勬槸鏂瑰紡
2
鍜屾柟寮?/p>
3
锛屾柟寮?/p>
3
浜х敓
杩炵画鏂规尝
绛旓細
D
2
锛?/p>
8253
姣忎釜璁℃暟鍣ㄧ殑鏈�澶ц鏁板垵鍊兼槸锛?/p>
锛?/p>
銆?/p>
A. 65536
B. FF00H
C. 0000H
D. FFFFH
鍒嗘瀽锛?/p>
8253
姣忎釜璁℃暟鍣ㄧ殑璁℃暟鑼冨洿鏄?/p>
1
锝?/p>
65536
锛?/p>
褰撹鏁板垵鍊间负
0000H
鏃讹紝
璁℃弧
65536
锛?/p>
鍑?/p>
1
璁℃暟鍣ㄥ噺涓?/p>
0
銆?/p>
绛旓細
C
3.
鑻?/p>
8253
瀹氭椂
/
璁℃暟鍣ㄥ浜庤鏁拌繃绋嬩腑锛屽綋
CPU
瀵瑰畠瑁呭叆鏂扮殑璁℃暟鍒濆�兼椂锛屽叾缁撴灉灏?/p>
鏄紙
锛?/p>
銆?/p>
A. 8253
瀹氭椂
/
璁℃暟鍣ㄧ姝㈢紪绋?/p>
B. 8253
瀹氭椂
/
璁℃暟鍣ㄥ厑璁哥紪绋嬶紝骞舵敼鍙樺綋鍓嶇殑璁℃暟杩囩▼
C. 8253
瀹氭椂
/
璁℃暟鍣ㄥ厑璁哥紪绋嬶紝浣嗕笉鏀瑰彉褰撳墠鐨勮鏁拌繃绋?/p>
D. 8253
瀹氭椂
/
璁℃暟鍣ㄥ厑璁哥紪绋嬶紝鏄惁褰卞搷褰撳墠鐨勮鏁拌繃绋嬮殢宸ヤ綔鏂瑰紡鑰屽彉