02
TA
When hardware flow control is not being used, the 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.
2.7. Reset to Factory Defaults
To set all the configuration settings 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 power is on.
2.8. Dipswitch
With the combination of 4 slot dipswitches, baud rate and hardware flow control can be set.
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 2-4 Baud rate Settings by Dipswitches
2400 4800 9600 19.2K 38.4K 57.6K 115.2K S/W
Config
baud rate
Table 2-5 Hardware Flow Control Settings by Dipswitches
No Use
Use
Hardware Flow Control
Handshaking
* Note: You cannot set the SD1000U to a Baud rate of 1200 and 230K by way of the Dipswitch. If you
want to use them, to set these speeds, please configure the dipswitch to S/W Config setting and use
ParaniWIN or AT commands. Please refer to ParaniWIN and Appendix 0 AT+UARTCONFIG, Baud
rate,Paraty,Stopbit.
