參數(shù)資料
型號(hào)： MR80C52CXXX-36/883:R
廠商： TEMIC SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 36 MHz, MICROCONTROLLER, CQCC44
文件頁數(shù)： 110/142頁
文件大?。?/td> 25028K
198
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
19.12 Examples of Baud Rate Setting
For standard crystal and resonator frequencies, the most commonly used baud rates for asyn-
chronous operation can be generated by using the UBRR settings in Table 19-9 to Table 19-12.
UBRR values which yield an actual baud rate differing less than 0.5% from the target baud rate,
are bold in the table. Higher error ratings are acceptable, but the Receiver will have less noise
resistance when the error ratings are high, especially for large serial frames (see ”Asynchronous
Operational Range” on page 190). The error values are calculated using the following equation:
Error[%]
BaudRate
Closest Match
BaudRate
--------------------------------------------------------
1
–
100%
=
Table 19-9.
Examples of UBRRn settings for commonly used oscillator frequencies.
Baud
rate
[bps]
f
osc = 1.0000MHz
f
osc = 1.8432MHz
f
osc = 2.0000MHz
U2Xn = 0U2Xn = 1
U2Xn = 0U2Xn = 1U2Xn = 0U2Xn = 1
UBRR
Error
UBRR
Error
UBRR
Error
UBRR
Error
UBRR
Error
UBRR
Error
2400
250.2%510.2%47
0.0%
950.0%510.2%
103
0.2%
4800
120.2%250.2%23
0.0%
470.0%250.2%510.2%
9600
6
-7.0%
12
0.2%
11
0.0%
23
0.0%
12
0.2%
25
0.2%
14.4k
3
8.5%
8
-3.5%
7
0.0%
15
0.0%
8
-3.5%
16
2.1%
19.2k
2
8.5%
6
-7.0%
5
0.0%
11
0.0%
6
-7.0%
12
0.2%
28.8k
1
8.5%
3
8.5%
3
0.0%
7
0.0%
3
8.5%
8
-3.5%
38.4k
1
-18.6%
2
8.5%
2
0.0%
5
0.0%
2
8.5%
6
-7.0%
57.6k
0
8.5%
1
8.5%
1
0.0%
3
0.0%
1
8.5%
3
8.5%
76.8k
–
1
-18.6%
1
-25.0%
2
0.0%
1
-18.6%
2
8.5%
115.2k
–
0
8.5%
0
0.0%
1
0.0%
0
8.5%
1
8.5%
230.4k
–
–––
–0
0.0%
–––
–
250k
–
–––
––0
0.0%
Max. (1)
62.5kbps
125kbps
115.2kbps
230.4kbps
125kbps
250kbps
1.
UBRR = 0, Error = 0.0%.
相關(guān)PDF資料
PDF描述
MR80C52EXXX-16SHXXX:RD 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQCC44
MQ80C32-12SHXXX:D 8-BIT, 12 MHz, MICROCONTROLLER, CQFP44
MQ80C32-20SHXXX:RD 8-BIT, 20 MHz, MICROCONTROLLER, CQFP44
MC80C52CXXX-36:D 8-BIT, MROM, 36 MHz, MICROCONTROLLER, CDIP40
MC80C52XXX-36/883:D 8-BIT, MROM, 36 MHz, MICROCONTROLLER, CDIP40
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