C517A_99 Datasheet, PDF (148/218 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

On-Chip Peripheral Components
C517A
Special Function Register S1RELH (Address BBH)
Special Function Register S1RELL (Address 9DH)
Reset Value : XXXXXX11B
Reset Value : 00H
Bit No. MSB
LSB
7
6
5
4
3
2
1
0
BBH
–
–
–
–
–
– MSB .0 S1RELH
7
6
5
4
3
2
1
0
9DH
.7
.6
.5
.4
.3
.2
.1 LSB _S1RELL
Bit
S1RELH.0-1
S1RELL.0-7
Function
Baudrate generator for serial interface 1 reload high value
Upper two bits of the baudrate timer reload value.
Baudrate generator for serial interface 1 reload low value
Lower 8 bits of the baudrate timer reload value.
The baud rate in operating modes A and B can be determined by following formula:
Mode A, B baud rate =
oscillator frequency
32 x (baud rate generator overflow rate)
Baud rate generator overflow rate = 2¹⁰ – S1REL
with S1REL = S1RELH.1 – 0, S1RELL.7 – 0
Semiconductor Group
6-82