User's Manual

Class 1 Bluetooth v2.0 Module
User’s Guide
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28
CONN-GUIDE-BT730_v0.9
Reg.
#
Defaul
t
Range
Comment
S516
0x000
000
0..0x2FFFF
FF
Default Device Class filter to be used with AT+BTI when it is not
explicitly specified. When queried the value is always printed as a hex
number.
The seventh most significant digit, can be 0, 1, or 2, and is used to
specify the type of device class filter.
When 0, it specifies no filtering.
When 1, it specifies an AND mask and all 24 bits are relevant
When 2, it specifies a filter to look for devices with matching major
device class which occupies a 5 bit field from bits 8 to 12 inclusive
(assuming numbering starts at bit 0). All other 19 bits MUST be set to
0.
S517
20
2..61
Inquiry Length in units of seconds. This parameter is referenced by
the AT+BTI command
S518
8
0..255
Maximum number of responses from an inquiry request. This
parameter is reference by the AT+BTI command. If this number is set
too high, then AT+BTI will return ERROR 27. For a particular
firmware revision, determine the effective maximum value by trial and
error. That is, set to a high value, send AT+BTI and if ERROR 27 is
returned, then retry with a smaller value. This effective max value
remains unchanged for that particular firmware build.
S519
500
100..3000
When S507>0, and in a connection, DSR can be used to change
from data to command state by deasserting the DSR line for less than
the time specified in this register. This value is rounded down to the
nearest 100 ms.
S520
TBC
1200..1152
00
Change to a standard baud rate. The effect is immediate and the OK
is sent at the new baud rate. Only one of the following baud rates are
accepted: 1200, 2400, 4800, 9600, 19200, 28800, 38400, 57600,
115200.
If S register 525=1, then the maximum baud rate is limited to 115200.
See S Register 526 for further information.