參數資料
型號: SAF-C515C-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, 10 MHz, MICROCONTROLLER, PQFP80
封裝: METRIC, PLASTIC, QFP-80
文件頁數: 31/55頁
文件大?。?/td> 268K
代理商: SAF-C515C-LM
Semiconductor Group
31
1997-08-01
C515
Figure 13
Block Diagram of Baud Rate Generation for the Serial Interface
Table 6
below lists the values/formulas for the baud rate calculation of the serial interface with its
dependencies of the control bits BD and SMOD.
Table 6
Serial Interface - Baud Rate Dependencies
Serial Interface 0
Operating Modes
Active Control Bits Baud Rate Calculation
BD
SMOD
Mode 0 (Shift Register)
f
OSC
/ 12
Controlled by timer 1 overflow :
(2
SMOD
×
timer 1 overflow rate) / 32
Controlled by system clock divider circuits :
(2
SMOD
×
f
OSC
) / 2496
f
OSC
/ 64
f
OSC
/ 32
Mode 1 (8-bit UART)
Mode 3 (9-bit UART)
0
X
1
X
Mode 2 (9-bit UART)
0
1
MCB03206
Rate
Clock
f
OSC
(SMOD)
Baud
PCON.7
÷ 2
(SM0/
SM1)
SCON.7
SCON.6
Only one mode
can be selected
ADCON.7
(BD)
0
1
0
1
Timer
Overflow
Mode
Mode
Note: The switch configuration shows the reset state.
1
0
2
3
Mode
Mode 1
÷ 6
/2
÷ 39
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