SENA Parani-SD200L - Manual (Page 40)

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Appendix C: S-Register
S-registers contains 46 parameters for the Parani-SD200L. These are stored in flash memory and the
values will be saved unless hardware reset is executed. The value of S-register can be accessed and
changed with ATS command. Some S-registers not shown below are set to maximize the performance
of Parani-SD200L. Thus it is not recommended to change these S-registers.
Changing the values of S-register can only be done in the Standby mode. Turn SD off and on.
C.1. S1: Force to Reconnect (default 1)
S1=0, Parani-SD200L in Mode1 does not try to reconnect when disconnected.
S1=1, Parani-SD200L in Mode1 keeps trying to reconnect when disconnected.
C.2. S3: Stream UART Policy (default 0)
S3=0, the priority of UART streaming is throughput.
S3=1, the priority is latency, which minimizes the delay of data transmission. This is useful in case of
transmiting very small data quickly.
When this value is 1, in order to minimize latency, SD sends the received data immediately. When this
value is 0, the SD maximizes throughput, the SD stores received data for a short time and sends a
large data packet. If the packet length is less than 100 bytes, having latency being the priority is
recommended. If the packet length is more than 100 bytes, having throughput as the priority is
recommended. Also, if you want to use high baudrate, throughput priority will be more effective. Just
for reference, the buffer length for receiving data is 2 Kbytes.
C.3. S4: Enable Remote Name Query (default 1)
S4=0, Parani-SD200L will query only the BD address. This speeds up the inquiry process.
S4=1, Parani-SD200L will query the BD address, device name and class of device.
When this value is 1, SD finds not only BD address but also friendly name. When this value is 0, SD
finds only BD address. When set to 0 this will make queries much faster. When using the pairing
button, finding friendly name will be omitted automatically.
C.4. S6: Enable Low Power Mode (default 0)
S6=0, deactivate Low Power Mode.
S6=1, activate Low Power Mode.
This value decides whether SD works in Low Power Mode or not. When this value is 0, SD works only
in active power mode. When SD works in Low Power mode, delay in transferring data may occur.
C.5. S10: Enable Response Message (default 1)
S10=0, Parani-SD200L does not send response messages to the host system.
S10=1, Parani-SD200L sends response messages to host system.
This value decides whether SD sends response messages such as OK, ERROR, CONNECT,
DISCONNECT or not. When this value is 0, SD will not send any response messages. If the response
messages conflicts with your host programs or devices that is connected to SD, change this value to 0.
C.6. S11: Enable Escape (default 1)
S11=0, Parani-SD200L does not allow escape sequence characters. The operation status of Connect
cannot be changed to Standby. Since the Parani-SD200L skips the process of detecting escape
sequence characters, more efficient data transmission can be had.
S11=1, Parani-SD200L allows for the escape sequence charactesr. Whenever it is needed, the
Connect status can be changed to Standby.