參數(shù)資料
型號(hào): SAB-C504-L24M
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, 24 MHz, MICROCONTROLLER, PQFP44
文件頁數(shù): 24/49頁
文件大?。?/td> 962K
代理商: SAB-C504-L24M
C504
Semiconductor Group
24
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 6
. The possible baudrates can be calculated using the
formulas given in
table 6
.
Figure 8
Block Diagram of Baud Rate Generation for the Serial Interface
Table 6
USART Operating Modes
Mode
SCON
Baudrate
Description
SM0
0
SM1
0
0
f
OSC
/12
Serial data enters and exits through R
×
D.
T
×
D outputs the shift clock. 8-bit are
transmitted/received (LSB first)
1
0
1
Timer 1/2 overflow rate
8-bit UART
10 bits are transmitted (through T
×
D) or
received (R
×
D)
9-bit UART
11 bits are transmitted (T
×
D) or
received (R
×
D)
9-bit UART
Like mode 2 except the variable baud rate
2
1
0
f
OSC
/32 or
f
OSC
/64
3
1
1
Timer 1/2 overflow rate
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