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參數(shù)資料
| 型號： | C505-LM |
| 廠商： | SIEMENS AG |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-Bit CMOS Microcontroller |
| 中文描述： | 8位CMOS微控制器 |
| 文件頁數(shù)： | 35/85頁 |
| 文件大?。?/td> | 335K |
| 代理商： | C505-LM |
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Semiconductor Group
35
1997-12-01
C505 / C505C
C505A / C505CA
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 8
.
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 14
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 either from timer 1
or from a decdicated baud rate generator (see
figure 14
).
Table 8
USART Operating Modes
Mode
SCON
Description
SM0
SM1
0
0
0
Shift register mode, fixed baud rate
Serial data enters and exits through R
×
D; T
×
D outputs the shift
clock; 8-bit are transmitted/received (LSB first)
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(guān)PDF資料 |
PDF描述 |
|---|---|
| C505A-4EM | 8-Bit CMOS Microcontroller |
| C505C-LM | 8-Bit CMOS Microcontroller |
| C505CA-2R | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| C505CA-4E | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
| C505CA-4R | 8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| C505MB290-S0600 | 制造商:CREE 制造商全稱:Cree, Inc 功能描述:MegaBright㈢ Generation II LEDs |
| C505RT230-0101 | 制造商:MARKTECH 制造商全稱:Marktech Corporate 功能描述:RazerThin LEDs |
| C505RT230-0102 | 制造商:MARKTECH 制造商全稱:Marktech Corporate 功能描述:RazerThin LEDs |
| C505RT230-0103 | 制造商:MARKTECH 制造商全稱:Marktech Corporate 功能描述:RazerThin LEDs |
| C505RT230-0104 | 制造商:MARKTECH 制造商全稱:Marktech Corporate 功能描述:RazerThin LEDs |
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