參數(shù)資料
型號(hào): SAB-C517A-4R24M
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, MROM, 24 MHz, MICROCONTROLLER, PQFP100
文件頁數(shù): 39/67頁
文件大小: 479K
代理商: SAB-C517A-4R24M
Semiconductor Group
39
1997-10-01
C517A
Table 11
below lists the values/formulas for the baud rate calculation of serial interface 0 and 1 with
its dependencies of the control bits BD and SMOD.
Table 11
Serial Interfaces - Baud Rate Dependencies
Serial Interface
Operating Modes
Active Control
Bits
Baud Rates
SMOD
BD
Mode 0 (Shift Register)
Fixed baud rate clock fosc/12
Mode 1 (8-bit UART)
Mode 3 (9-bit UART)
X
0
Timer 1 overflow is used for baud rate
generation; SMOD controls a divide-by-2 option.
Baud rate = 2
SMOD
x timer 1 overflow rate / 32
1
Baud rate generator is used for baud rate
generation; SMOD controls a divide-by-2 option
Baud rate = 2
SMOD
x oscillator frequency /
64 x (baud rate gen. overflow rate)
Mode 2 (9-bit UART)
X
Fixed baud rate clock fosc/32 (SMOD=1) or fosc/
64 (SMOD=0)
Mode A (9-bit UART)
Mode B (8-bit UART)
Baud rate generator is used for baud rate
generation; SMOD controls a divide-by-2 option
Baud rate = oscillator frequency /
32 x (baud rate gen. overflow rate)
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