SAB80C515A Datasheet, PDF (39/57 Pages) Siemens Semiconductor Group – 8-Bit CMOS Single-Chip Microcontroller

SAB 80C515A/83C515A-5
Serial Interface
The SAB 80C515A has a full duplex and receive buffered serial interface. It is functionally
identical with the serial interface of the SAB 8051.
Table 6 shows possible configurations and the according baud rates.
Table 6
Baud Rate Generation
Mode
Mode 0
8-Bit
syn-
chron-
ous
channel
Baud-
rate
f _OSC =12 MHz 1 MHz
f_OSC =16 MHz 1.33 MHz
f _OSC =18 MHz 1.5 MHz
derived from
Mode
f _OSC
Mode 1
8-Bit
UART
Baud-
rate
f_OSC =12 MHz
f_OSC =16 MHz
f_OSC =18 MHz
derived from
1 Baud – 62.5 kBaud
1 Baud – 83 kBaud
1 Baud – 93.7 kBaud
Timer 1
183 Baud – 375 kBaud
244 Baud – 500 kBaud
2375 Baud – 562.5 kBaud
10-Bit Baudrate
Generator
Mode
Mode 2
Mode 3
9-Bit
UART
Baud- f_{OSC =}12 MHz 187.5 kBaud/ 1 Baud – 183 Baud –75 kBaud
rate
375 kBaud 62.5 kBaud
f_OSC=16 MHz 250 Baud/ 1 Baud – 244 Baud – 500 kBaud
500 kBaud 83.3 kBaud
f_OSC =18 MHz 281.2 kBaud/ 1 Baud – 275 Baud – 562.5 kBaud
562.5 kBaud 93.7 kBaud
derived from
f_OSC/2
Timer 1
10-Bit
Baudrate
Generator
Semiconductor Group
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