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參數(shù)資料
| 型號： | SAF-C515A-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, 18 MHz, MICROCONTROLLER, PQFP80 |
| 文件頁數(shù)： | 30/55頁 |
| 文件大?。?/td> | 268K |
| 代理商： | SAF-C515A-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
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| SAF-C515C-LM | 8-Bit CMOS Microcontroller |
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| SAB-C515-1RM | 8-Bit CMOS Microcontroller |
| SAB-C515-L24M | 8-Bit CMOS Microcontroller |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAFC515C8EM | 制造商:Infineon Technologies AG 功能描述:8bit microcontrollerSAF-C515C-8EM MQFP80 |
| SAF-C515C-8EM | 制造商:Infineon Technologies AG 功能描述:IC 8BIT MCU OTP SMD 制造商:Infineon Technologies AG 功能描述:IC, 8BIT MCU OTP, SMD |
| SAFC515C-8EM | 制造商:Infineon Technologies AG 功能描述:IC 8BIT CPU SMD MQFP80 515 |
| SAF-C515C-8EM CA | 功能描述:8位微控制器 -MCU 8 BIT OTP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| SAFC515C8EM-BC | 制造商:Infineon Technologies AG 功能描述:MCU 8-Bit C500 8051 CISC 64KB EPROM 5V 80-Pin MQFP |
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