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參數(shù)資料
| 型號： | SAF-C515C-LM |
| 廠商： | SIEMENS A G |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-Bit CMOS Microcontroller |
| 中文描述： | 8-BIT, 10 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | METRIC, PLASTIC, QFP-80 |
| 文件頁數(shù)： | 30/55頁 |
| 文件大?。?/td> | 268K |
| 代理商： | SAF-C515C-LM |
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C515
Semiconductor Group
30
1997-08-01
Serial Interface (USART)
The serial port is full duplex and can operate in four modes (one synchronous mode, three
asynchronous modes) as illustrated in
table 5
. The possible baudrates can be calculated using the
formulas given in
table 5
.
For clarification some terms regarding the difference between "baud rate clock" and "baud rate"
should be mentioned. In the asynchronous modes the serial interfaces require a clock rate which is
16 times the baud rate for internal synchronization. Therefore, the baud rate generators/timers have
to provide a "baud rate clock" (output signal in
figure 13
to the serial interface which - there divided
by 16 - results in the actual "baud rate". Further, the abbrevation f
OSC
refers to the oscillator
frequency (crystal or external clock operation).
The variable baud rates for modes 1 and 3 of the serial interface can be derived from either timer 1
or from the system clock (see
figure 13
).
Table 5
USART Operating Modes
Mode
SCON
Description
SM0
SM1
0
0
0
Shift register mode
Serial data enters and exits through R
×
D/ T
×
D outputs the shift
clock; 8-bit are transmitted/received (LSB first); fixed baud rate
1
0
1
8-bit UART, variable baud rate
10 bits are transmitted (through T
×
D) or received (at R
×
D)
9-bit UART, fixed baud rate
11 bits are transmitted (through T
×
D) or received (at R
×
D)
9-bit UART, variable baud rate
Like mode 2
2
1
0
3
1
1
相關PDF資料 |
PDF描述 |
|---|---|
| SAB-C515-1R24M | 8-Bit CMOS Microcontroller |
| SAB-C515-1RM | 8-Bit CMOS Microcontroller |
| SAB-C515-L24M | 8-Bit CMOS Microcontroller |
| SAB-C515-LM | 8-Bit CMOS Microcontroller |
| SAB-C515A-LM | 8-Bit CMOS Microcontroller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SAF-C515-L24M | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAF-C515-L24N | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAF-C515-LM | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
| SAFC515LN | 制造商:Infineon Technologies AG 功能描述:MCU 8-bit C500 8051 CISC ROMLess 5V 68-Pin PLCC |
| SAF-C515-LN | 制造商:Rochester Electronics LLC 功能描述: |
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