SAB80C515A-5 Datasheet, PDF (90/108 Pages) Siemens Semiconductor Group – 8-Bit CMOS Single-Chip Microcontroller Family

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
8-Bit
syn-
chron-
ous
channel
Baud-
rate
Mode
f _OSC =12 MHz 1 MHz
f_OSC =16 MHz 1.33 MHz
f _OSC =18 MHz 1.5 MHz
Mode 0
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
9-Bit
UART
Baud-
rate
Mode
Mode 2
Mode 3
f_{OSC =}12 MHz
f_OSC=16 MHz
f_OSC =18 MHz
187.5 kBaud/ 1 Baud –
375 kBaud 62.5 kBaud
250 Baud/ 1 Baud –
500 kBaud 83.3 kBaud
281.2 kBaud/ 1 Baud –
562.5 kBaud 93.7 kBaud
183 Baud –75 kBaud
244 Baud – 500 kBaud
275 Baud – 562.5 kBaud
derived from
f_OSC/2
Timer 1
10-Bit
Baudrate
Generator
Semiconductor Group
6-38