C517A_99 Datasheet, PDF (154/218 Pages) Siemens Semiconductor Group – 8-Bit CMOS Microcontroller

TX Clock
Write
to SBUF
Send
Data
Shift
TXD
S1P1
Start Bit D0
D1
D2
D3
D4
D5
D6
D7 Stop Bit
TI
RX Clock
RXD
Bit Detector
Sample Times
..-16 RESET
Start Bit D0
D1
D2
D3
D4
D5
D6
D7 Stop Bit
Shift
RI
MCT01936
Note : x=0 for serial interface 0 and x=1 for serial interface 1.