參數(shù)資料
型號(hào): C505C-2R
廠商: INFINEON TECHNOLOGIES AG
元件分類: 圓形連接器
英文描述: Circular Connector; No. of Contacts:5; Series:; Body Material:Aluminum; Connecting Termination:Solder; Connector Shell Size:18; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:18-5
中文描述: 8位單片機(jī)
文件頁(yè)數(shù): 37/88頁(yè)
文件大?。?/td> 1224K
代理商: C505C-2R
C505/C505C/C505A/C505CA
Data Sheet
33
12.00
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 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 7
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
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