sak-c868p-1rr Infineon Technologies Corporation, sak-c868p-1rr Datasheet - Page 148

• Manufacturer Part Number: sak-c868p-1rr
• Description: 8 - Bit Cmos Microcontroller
• Manufacturer: Infineon Technologies Corporation

Field
SM0
SM1
4.9.1
There are several possibilities to generate the baud rate clock for the serial port
depending on the mode in which it is operating.
For clarification, some terms regarding the difference between "baud rate clock" and
"baud rate" should be mentioned. The serial interface requires a clock rate which is 16
times the baud rate for internal synchronization. Therefore, the baud rate generators
have to provide a "baud rate clock" to the serial interface which - there divided by 16 -
results in the actual "baud rate". However, all formulas given in the following section
already include the factor and calculate the final baud rate. Further, the abrevation f
refers to the system frequency.
User’s Manual
Baud Rate Generation
Bits
[7:6]
Typ Description
rw
Serial port 0 operating mode selection bits
Table 1 :
0
0
1
1
SM0
4-104
SM1
0
1
0
1
Selected operating mode
mode 0 :reserved
mode 1 :8-bit UART, variable baud
rate
mode 2 :9-bit UART, fixed baud
rate
( f
Mode 3 :9-bit UART, variable baud
rate
sys
On-Chip Peripheral Components
/32 or f
sys
/64)
V 1.0, 2003-01
C868
SYS