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3. Difference Summary
This section summarizes the differences between the DART 200 and DART 300 in several main
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.
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.
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) only
FIFO Buffer Yes Yes
