TOBY-L4 series - System Integration Manual
UBX-16024839 - R04
System description
Page 41 of 143
The USB Super-Speed 3.0 compliant interface as per
USB 3.0 specifications
[4], with the module acting as a USB
device, consists of the following additional pins:
U
/
USB_SSTX–
, USB Super-Speed differential transmitter data lines
U
/
USB_SSRX–
, USB Super-Speed differential receiver data lines
USB drivers are available for Windows operating system platforms. TOBY-L4 series modules are compatible with
standard Linux/Android USB kernel drivers.
1.9.2
UART interfaces
UART interfaces are not supported by the "50" product version, except for trace logging (diagnostic
purposes) and Ring Indicator functionality over the UART0 interface.
1.9.2.1
UART0 interface
The UART0 Universal Asynchronous Receiver/Transmitter serial interface has CMOS compatible signal levels
(0 V for ON / active state and 1.8 V for OFF / idle state), providing:
Communication with external devices by means of the uCPU API, over the following pins:
o
RXD
module output and
TXD
module input data lines
o
CTS
module output and
RTS
module input hardware flow control lines
Trace logging (diagnostic purpose), over the following pins:
o
RXD
module output and
TXD
module input data lines
Ring Indicator functionality, over the following pin:
o
RI
module output line
The UART0 interface can operate at 9.6 kbit/s, 19.2 kbit/s, 38.4 kbit/s, 57.6 kbit/s, 115.2 kbit/s, 230.4 kbit/s,
460.8 kbit/s, 921.6 kbit/s, 3 Mbit/s, 3.25 Mbit/s and 6.5 Mbit/s baud rates, with 8N1 frame format (illustrated in
Figure 16), and with hardware flow control output (
CTS
line) driven to the OFF state when the module is not
prepared to accept data by the UART0 interface.
D0
D1
D2
D3
D4
D5
D6
D7
Start of 1-Byte
transfer
Start Bit
(Always 0)
Possible Start of
next transfer
Stop Bit
(Always 1)
t
bit
= 1/(Baudrate)
Normal Transfer, 8N1
Figure 16: Description of UART 8N1 frame format (8 data bits, no parity, 1 stop bit)
