User's Manual l MBLX2160A UM 0101 l © 2022, TQ-Systems GmbH
Page 32
3.9.7
UART
The LX2160A provides four UART interfaces with Rx/Tx signals, or two UART interfaces when the handshake signals are used.
On the MBLX2160A, one UART is connected as RS-232 to a D-Sub-9 connector, which serves as the primary console. The data rate
for the console outputs is 115200 baud.
The RS-232 SP3232EEY transceiver signals are routed through a 1.8V
⇔
3.3V level shifter.
The UART signals UART2, UART3 and UART4, or the handshake signals, are routed directly to a pin header. The handshake lines
are routed to the RS-232 D-Sub-9 connector via 0 Ω resistors. Additionally, all UART signals are routed to pin header X27.
Figure 31:
Block diagram UART with RS-232
3.9.8
GPIO port expanders
Four GPIO expanders are provided on the MBLX2160A. Three are accessible via I²C bus I2C_5_MUX_CH2, the fourth via I2C_1.
Figure 32:
Block diagram GPIO expander at the I2C buses
