User Manual
641
Rev. 1.1
2019-03-18
TLE984xQX
Microcontroller with LIN and Power Switches for Automotive Applications
UART1/UART2
19.9
Interfaces of the UART Module
An overview of the I/O interface is shown in
.
In mode 0 (the serial port behaves as a shift register) data is shifted in through RXD_1 and out through RXDO,
while the TXD_1 line is used to provide a shift clock which can be used by external devices to clock data in and
out. In modes 1, 2 and 3, the port behaves as a UART. Data is transmitted on TXD and received on RXD.
Data that is shifted into and out of the UART through RXD and TXD respectively, can be selected from different
sources. This selection is performed by the SCU via SFR-bit MODPISEL.URIOS1.
Figure 171 UART1 Module I/O Interface
P
1
.4
/R
X
D
1
P0
.1
/T
X
D
1
UART1 disreq from SCU _DM
UART
Module
(Kernel)
RI1
TI1
Clock
Control
Address
Decoder
f
UART1
SCU_D
M
Interrupt
Control
SSC Module
AHB Interface
SCU_DM
RXD_1
TXD_1
LIN Transceiver
LIN
f
BR
Baud Rate
Generator 1
URIOS1
U_TX_CONDIS
LIN_TXD
LIN_RXD
RXD1
SCU_DM