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參數(shù)資料
| 型號： | Q67121-C900 |
| 廠商： | SIEMENS AG |
| 英文描述： | 16-Bit CMOS Single-Chip Microcontroller |
| 中文描述： | 16位CMOS單芯片微控制器 |
| 文件頁數(shù)： | 38/69頁 |
| 文件大?。?/td> | 1124K |
| 代理商： | Q67121-C900 |
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C515C
Semiconductor Group
38
1997-07-01
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 7
.
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 15
to the serial interface which - there divided
by 16 - results in the actual "baud rate". Further, the abrevation 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 15
).
Table 7
USART Operating Modes
Mode
SCON
Description
SM0
0
SM1
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PDF資料 |
PDF描述 |
|---|---|
| Q67121-C923 | C16x-Family of High-Performance CMOS 16-Bit Microcontrollers |
| Q67121-C942 | 16-Bit CMOS Single-Chip Microcontroller |
| Q67121-C946 | 16-Bit CMOS Single-Chip Microcontroller |
| Q67121-C967 | 16-Bit CMOS Single-Chip Microcontroller |
| Q67126-C2001 | 8-Bit CMOS Microcontroller |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| Q67121-C923 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:C16x-Family of High-Performance CMOS 16-Bit Microcontrollers |
| Q67121-C942 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:16-Bit CMOS Single-Chip Microcontroller |
| Q67121-C946 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:16-Bit CMOS Single-Chip Microcontroller |
| Q67121-C967 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:16-Bit CMOS Single-Chip Microcontroller |
| Q67126-C2001 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:8-Bit CMOS Microcontroller |
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