EDM1-IMX6 HARDWARE MANUAL
– VER 1.00 – NOV 14 2019
Page
50
of
80
3.12. Universal Asynchronous Receiver/Transmitter (UART) Interface
The EDM1-IMX6 makes 2 UART ports available on the EDM connector and utilizes an additional UART
on the module to connect to the WiFi/Bluetooth module.
The i.MX6 processor integrated UARTs support the following features:
•
High-speed TIA/EIA-232-F compatible, up to 5.0 Mbit/s.
•
Serial IR interface low-speed, IrDA-compatible (up to 115.2 Kbit/s).
•
9-bit or Multidrop mode (RS-485) support (automatic slave address detection).
•
7 or 8 data bits for RS-232 characters or 9 bit RS-485 format, 1 or 2 stop bits.
•
Programmable parity (even, odd, and no parity).
•
Hardware flow control support for request to send (RTS) and clear to send (CTS) signals
•
RXD input and TXD output can be inverted respectively in RS-232/RS-485 mode
•
RS-485 driver direction control via CTS signal
•
Auto baud rate detection (up to 115.2 Kbit/s)
•
Two independent, 32-entry FIFOs for transmit and receive
For additional details, please refer to the “Universal Asynchronous Receiver/Transmitter (UART)” chapter
of the “i.MX6 Reference Manual”.
Table 26 - Primary UART Signal Description
EDM
PIN
i.MX6
BALL
PAD NAME
Signal
V
I/O
Description
241
G21
EIM_D19
UART1_CTS_B
3V3
O
Universal Asynchronous
Receive Transmit secondary
channel clear to send signal
243
M1
CSI0_DAT10
UART1_TX_DATA
3V3
O
Universal Asynchronous
Receive Transmit secondary
channel transmit data signal
245
M3
CSI0_DAT11
UART1_RX_DATA
3V3
I
Universal Asynchronous
Receive Transmit secondary
channel receive data signal
247
G20
EIM_D20
UART1_RTS_B
3V3
O
Universal Asynchronous
Receive Transmit secondary
channel request to send
signal
NOTE: it is recommended to use the UART1 interface as system debug where possible and use the
UART2 signals in applications where one serial port is required.