SENA Parani-SD1000U - Manual (Page 14)

When using hardware flow control, Parani-SD1000U disables RTS so that it stops receiving any
further data from the host when the buffer becomes full. RTS will be re-enabled again to begin
receiving data from the host when the buffer has created more room for more data.
When hardware flow control is not being used, the Parani-SD1000U clears the buffer to secure room
for the next data when the buffer becomes full. This can mean a loss of data may occur. As the
transmission data becomes large, the possibility of data loss becomes greater.
For large data transmissions, the use of hardware flow control is highly recommended.
3.6. Reset to Factory Defaults
To set to its factory default parameters, press the reset button, depicted in Fig. 3-1. Press and hold (for
at least 1 sec) the reset button with a narrow pointed tool like paper clip. Reset works only when
SD1000U is connect to usb port.
3.7. Dipswitch
With the combination of 4 slot dipswitches, baud rate and hardware flow control can be set.
Figure 3-1 The Parani-SD1000U Dipswitch
Upper 3 dipswitches are used for setting the baud rate, and bottom dipswitch is used for setting
hardware flow control option. If the baud rate needs to a baud rate not shown below, ParaniWIN or
terminal program should be used to set these speeds. To set a baud rate not shown below the
dipswitches should be in the S/W Config setting. When in the S/W Config setting the baud rate will go
back to 9600 as default.
Table 3-4 Baud rate Settings by Dipswitches
Baud rate
2400 4800 9600 19.2K 38.4K 57.6K 115.2K S/W
Config
Table 3-5 Hardware Flow Control Settings by Dipswitches
Hardware Flow Control
Handshaking
No Use Use
* Note: You cannot set the Parani-SD1000U to a Baud rate of 1200 and 230K by way of the Dipswitch.
Pairing Button
Dip switch
Reset