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參數(shù)資料
| 型號： | SCN2681AE1N40 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Dual asynchronous receiver/transmitter DUART |
| 中文描述： | 2 CHANNEL(S), 1M bps, SERIAL COMM CONTROLLER, PDIP40 |
| 封裝： | PLASTIC, DIP-40 |
| 文件頁數(shù)： | 18/30頁 |
| 文件大?。?/td> | 205K |
| 代理商： | SCN2681AE1N40 |
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Philips Semiconductors
Product specification
SCN2681
Dual asynchronous receiver/transmitter (DUART)
1998 Sep 04
18
Table 3.
Bit Rate Generator Characteristics Crystal or Clock = 3.6864MHz
NORMAL RATE (BAUD)
50
75
110
134.5
150
200
300
600
1050
1200
1800
2000
2400
4800
7200
9600
14.4K
19.2k
28.8K
38.4k
57.6K
115.2K
NOTE:
Duty cycle of 16x clock is 50%
±
1%.
ACTUAL 16x CLOCK (kHz)
0.8
1.2
1.759
2.153
2.4
3.2
4.8
9.6
16.756
19.2
28.8
32.056
38.4
76.8
115.2
153.6
230.4
307.2
460.8
614.4
921.6
1843.2K
ERROR (%)
0
0
-0.069
0.059
0
0
0
0
-0.260
0
0
0.175
0
0
0
0
0
0
0
0
0
Asynchronous UART communications can tolerate frequency error
of 4.1% to 6.7% in a “clean” communications channel. The percent
of error changes as the character length changes. The above
percentages range from 5 bits not parity to 8 bits with parity and one
stop bit. The error with 8 bits no parity and one stop bit is 4.6%. If a
stop bit length of 9/16 is used, the error tolerance will approach 0
due to a variable error of up to 1/16 bit time in receiver clock phase
alignment to the start bit.
Table 4.
ACR 6:4 Field Definition
ACR 6:4
000
001
010
011
100
101
110
111
MODE
Counter
Counter
Counter
Counter
CLOCK SOURCE
External (IP2)
TxCA – 1x clock of Channel A transmitter
TxCB – 1x clock of Channel B transmitter
Crystal or external clock (x1/CLK) divided by 16
External (IP2)
External (IP2) divided by 16
Crystal or external clock (x1/CLK)
Crystal or external clock (x1/CLK) divided by 16
Timer (square wave)
Timer (square wave)
Timer (square wave)
Timer (square wave)
NOTE:
Timer mode generates a squarewave.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| SCN2681T | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual asynchronous receiver/transmitter DUART |
| SCN2681TC1A44 | 制造商:NXP Semiconductors 功能描述: |
| SCN2681TC1A44A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART |
| SCN2681TC1N40 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Dual asynchronous receiver/transmitter DUART |
| SCN2681TC1N40A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UART |
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