Specifications

LEON-G100/G200 - System Integration Manual
GSM.G1-HW-09002-C Preliminary System description
Page 43 of 75
All flow control handshakes are supported by the UART interface and can be set by appropriate AT commands
(see u-blox AT Commands Manual [2]): hardware flow control (RTS/CTS), software flow control(XON/XOFF), or
none flow control.
Autobauding is supported and can be enabled or disabled by an AT command (see u-blox AT Commands
Manual [2]). Autobauding is enabled by default.
Hardware flow control is default.
For the complete list of supported AT commands and their syntax refer to the u-blox AT Commands Manual
[2].
Autobauding result can be unpredictable with spurious data if idle-mode (power-saving) is entered and the
hardware flow control is disabled.
The following baud rates can be configured using AT commands:
4800 bps,
9600 bps,
19200 bps,
38400 bps,
57600 bps,
115200 bps. Default when autobauding disabled.
The following baud-rates are available with autobauding only:
1200 bps,
230400 bps.
Automatic frame recognition is supported: this feature is enabled in conjunction with autobauding only, which is
enabled by default. The frame format can be:
8N1 (8 data bits, No parity, 1 stop bit),
8E1 (8 data bits, even parity, 1 stop bit),
8O1 (8 data bits, odd parity, 1 stop bit),
8N2 (8 data bits, No parity, 2 stop bits).
The default frame configuration with fixed baud rate is 8N1, described in the Figure 26.
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 26: UART default frame format (8N1) description