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參數(shù)資料
| 型號： | MC72000 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | Integrated Bluetooth Radio |
| 中文描述： | 集成藍(lán)牙無線 |
| 文件頁數(shù)： | 53/156頁 |
| 文件大?。?/td> | 1782K |
| 代理商： | MC72000 |
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MOTOROLA
MC72000
Advance Information Data Sheet
Go to: www.freescale.com
53
7.2.4 General UART Definitions
These general UART definitions will help in understanding the following sections.
Start Bit — A start bit is a bit of logic zero which indicates the beginning of a data frame. A start
bit must begin with a one to zero transition and is preceded by at least one bit time of logic one.
Stop Bit — A stop bit is a bit of logic one which indicates the end of a data frame. A stop bit follows
the data and any parity bit. They mark the end of a unit of transmission (normally a byte or
character).
Break — A frame or longer with RX/TX held low at logic zero. This kind of frame is generally sent
to signal the end of a message or the beginning of a new message.
Frame — A frame consists of a start bit followed by a specified number of data or information bits
terminated by a stop bit. The number of data or information bits depends on the format specified
and must agree between the transmitting device and the receiving device. The most common frame
format is one start bit followed by eight data bits (LSB first) terminated by one stop bit.
Framing Error — An error condition in which the stop bit of the received frame was missing. A
framing error results when the frame boundaries in the received bit stream are not synchronized
with the receiver bit counter. Framing errors are not always detected: if a data bit in the expected
stop bit time happens to be a logic one, the framing error may go undetected. A framing error is
always present on the receiver side, when the transmitter is sending breaks. However, if the UART
is set up to expect two stop bits, and only the first stop bit is received, then this is not a framing error.
Parity Error — An error condition in which the calculated parity of the received data bits in the
frame is different from the parity bit received on the RXD line. Parity error is only calculated after
an entire frame is received.An additional stop bit and parity bit may also be included.
Table 26. Standard Baud Rates
1
1.
2.
3.
Fractional divider values are shown for the 16 times oversampling mode.
At this baud rate, only 8 x oversampling is possible because (12 MHz/921600) < 16.
At this baud rate, only 8 x oversampling is possible because (24 MHz/1843200) < 16.
Baud Rate
IPSCLK = 12 Mhz
IPSCLK = 24 Mhz
MOD
INC
FREQ
MOD
INC
FREQ
1,200
2,400
4,800
9,600
19,200
28,800
38,400
57,600
115,200
230,400
460,800
921,600
10,000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
15
31
63
127
255
383
511
767
1535
3071
6143
6143
2
—
1,200
2,400
4,800
9,600
19,200
28,800
38,400
57,600
115,200
230,400
460,800
921,600
10,000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
7
15
31
63
127
191
255
383
767
1,535
3,071
6,143
1,200
2,400
4,800
9,600
19,200
28,800
38,400
57,600
115,200
230,400
460,800
921600
1,843,200
10,000
—
14000
8601
3
1843285.7
F
Freescale Semiconductor, Inc.
For More Information On This Product,
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| MC7220C-100M RI-BLK | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-20C 20CORE 100M 制造商:pro-power 功能描述:CABLE, DEF 7-2-20C, 20CORE, 100M 制造商:pro-power 功能描述:CABLE, DEF 7-2-20C, 20CORE, 100M; Reel Length (Imperial):328ft; Reel Length (Metric):100m; No. of Conductors:20; Voltage Rating:440V; No. of Strands x Strand Size:7 x 0.2mm; Conductor Area CSA:0.22mm2; Jacket Colour:Black; Jacket ;RoHS Compliant: Yes |
| MC7220C-100M RI-BLK | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-20C 20 CORE 100M |
| MC7220C-25M RI-BLK | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-20C 20CORE 25M 制造商:pro-power 功能描述:CABLE, DEF 7-2-20C, 20CORE, 25M |
| MC7220C-25M RI-BLK | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-20C 20 CORE 25M |
| MC7225C-25M RI-BLK | 制造商:Farnell / Pro-Power 功能描述:CABLE DEF 7-2-25C 25CORE 25M 制造商:pro-power 功能描述:MULTICORE, 25, 7/0.2MM, 25M, BLACK 制造商:pro-power 功能描述:CABLE, DEF 7-2-25C, 25CORE, 25M 制造商:PRIVATE LABEL 功能描述:CABLE, DEF 7-2-25C, 25CORE, 25M, Reel Length (Imperial):82ft, Reel Length (Metri |
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