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参数资料
| 型号： | MD82C54-12/B |
| 厂商： | INTERSIL CORP |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 3 TIMER(S), PROGRAMMABLE TIMER, CDIP24 |
| 封装： | CERDIP-24 |
| 文件页数： | 5/19页 |
| 文件大小： | 380K |
| 代理商： | MD82C54-12/B |
13
Counter
New counts are loaded and Counters are decremented on
the falling edge of CLK.
The largest possible initial count is 0; this is equivalent to 216
for binary counting and 104 for BCD counting.
The counter does not stop when it reaches zero. In Modes 0,
1, 4, and 5 the Counter “wraps around” to the highest count,
either FFFF hex for binary counting or 9999 for BCD count-
ing, and continues counting. Modes 2 and 3 are periodic; the
Counter reloads itself with the initial count and continues
counting from there.
FIGURE 15. GATE PIN OPERATIONS SUMMARY
FIGURE 16. MINIMUM AND MAXIMUM INITIAL COUNTS
SIGNAL
STATUS
MODES
LOW OR
GOING LOW
RISING
HIGH
0
Disables Counting
-
Enables Counting
1
-
1) Initiates
Counting
2) Resets output
after next clock
-
2
1) Disables
counting
2) Sets output im-
mediately high
Initiates Counting Enables Counting
3
1) Disables
counting
2) Sets output im-
mediately high
Initiates Counting Enables Counting
4
1) Disables
Counting
-
Enables Counting
5
-
Initiates Counting
-
MODE
MIN COUNT
MAX COUNT
01
0
11
0
22
0
32
0
41
0
51
0
NOTE: 0 is equivalent to 216 for binary counting and 104 for BCD
counting.
82C54
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MD82C54B | 制造商: 功能描述: 制造商:undefined 功能描述: |
| MD82C54Q | 制造商: 功能描述: 制造商:undefined 功能描述: |
| MD82C55/R | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MD82C55A | 制造商:HARRIS 制造商全称:HARRIS 功能描述:CMOS Programmable Peripheral Interface |
| MD82C55A/B | 制造商:Intersil Corporation 功能描述:CMOS PROGRAMMABLE PERIPHERAL INTRFC 40CDIP - Rail/Tube |
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