參數(shù)資料
型號(hào): C515C-8RM
廠商: INFINEON TECHNOLOGIES AG
元件分類: DC/DC變換器
英文描述: RW-S Series - Econoline Regulated DC-DC Converters; Input Voltage (Vdc): 48V; Output Voltage (Vdc): 05V; Power: 2W; DIP24 Low Profile Miniature Package; 1kVDC Isolation; Feedback Regulated Output; 2:1 Wide Range Voltage Input; Continuous Short Circuit Protection; Less than 7mm Height; SMD Pinning Option; Efficiency to 87%
中文描述: 8位單片機(jī)
文件頁(yè)數(shù): 43/96頁(yè)
文件大?。?/td> 1285K
代理商: C515C-8RM
C515C
Data Sheet
39
2003-02
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 15
to the serial interface which - there divided by 16 - results in the
actual “baud rate”. Further, the abbreviation
f
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 dedicated baud rate generator (see
Figure 15
).
Table 8
USART Operating Modes
SCON
SM0
SM1
0
0
Mode
Description
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)
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
1
0
1
2
1
0
3
1
1
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