TLE9877QXA20_15 Datasheet, PDF (61/122 Pages) Infineon Technologies AG – Microcontroller with LIN and BLDC MOSFET Driver for Automotive Applications

TLE9877QXA20
UART1/UART2
19.3
UART Modes
The UART can be used in four different modes. In mode 0, it operates as an 8-bit shift register. In mode 1, it
operates as an 8-bit serial port. In modes 2 and 3, it operates as a 9-bit serial port. The only difference between
mode 2 and mode 3 is the baud rate, which is fixed in mode 2 but variable in mode 3. The variable baud rate is
set by the underflow rate on the dedicated baud-rate generator.
The different modes are selected by setting bits SM0 and SM1 to their corresponding values, as shown in
Table 13.
Table 13 UART Modes
SM0
SM1
Operating Mode
0
0
Mode 0: 8-bit shift register
0
1
Mode 1: 8-bit shift UART
1
0
Mode 2: 9-bit shift UART
1
1
Mode 3: 9-bit shift UART
f_PCLK/2
Variable
f_PCLK/64
Variable
Baud Rate
The UART1 is connected to the integrated LIN transceiver, and to GPIO for test purpose. The UART2 is connected
to GPIO only.
Data Sheet
61
Rev. 1.0, 2015-04-30