Sierra Wireless 300 Benutzerhandbuch
2110291 Rev 1.0
Page 10
3. Difference
Summary
This section summarizes the differences between the DART 200 and DART 300 in several main
categories:
categories:
•
Interfaces
•
Operation
•
Additional Control Considerations
•
Specifications
3.1. Interfaces
3.1.1.
Serial Interface Specifications
The DART 300 supports a broader range of data rates (up to 57600 bps) but does not support
autobaud rate detection as the DART 200 did. The DART 300 also restricts the port
characteristics to 8 data bits and no parity.
autobaud rate detection as the DART 200 did. The DART 300 also restricts the port
characteristics to 8 data bits and no parity.
The DART 300 requires the use of DTR and hardware flow control to communicate in data state.
This will require specialized cabling if the host device does not support these features. Doing this
could be as simple as connecting DTR, RTS, or both, to DSR on the DART 300 end of the cable
to provide the needed signals.
This will require specialized cabling if the host device does not support these features. Doing this
could be as simple as connecting DTR, RTS, or both, to DSR on the DART 300 end of the cable
to provide the needed signals.
Be aware that circumventing hardware flow control in this way makes data overruns a possibility.
DART 200
DART 300
Data rates supported
300 – 19200 bps
300 – 57600 bps
Default data rate
9600 bps
19200 bps
Autobaud Yes
No
Data bits
7 / 8
8
Parity
None / Even / Odd
None
Stop Bits
1 / 2
1
Flow Control
None,
Hardware (RTS/CTS), and
Software (XON/XOFF)
Hardware (RTS/CTS), and
Software (XON/XOFF)
Hardware (RTS/CTS) only
FIFO Buffer
Yes
Yes