User's Manual

Enhanced Class 1 Bluetooth v2.1 Module
User’s Guide
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43
CONN-GUIDE-BT740_v0.2
RegNo
Dec
(Hex)
Min
Max
Category
Description
72 (48)
48
1024
HDP
HDP Profile related.
This is the max TX pdu size and computes to the nearest
multiple of 16.
Note: If HDP functionality is not included in the firmware
build, then this register is not available.
73 (49)
0
2000
0
Sniff Mode /
Power Saving
Sniff Attempt Time in units of milliseconds. 0 means
disable.
This value must be less than half the Sniff Minimum
Interval (SReg 75).
The value stores in an 8 bit number and so a non-linear
algorithm converts between the value to the 8 bit number.
This means writing and reading may yield different values.
See section Sniff Mode Explained.
74 (4A)
1
4000
0
Sniff Mode /
Power Saving
Sniff Timeout Time in units of milliseconds. 0 means
disable.
The value stores in an 8 bit number and so a non-linear
algorithm converts between the value to the 8 bit number.
This means writing and reading may yield different values.
See section Sniff Mode Explained.
75 (4B)
1
4000
0
Sniff Mode /
Power Saving
Sniff Minimum Interval in units of milliseconds.
The value stores in an 8 bit number and so a non-linear
algorithm converts between the value to the 8 bit number.
This means writing and reading may yield differing values.
See section Sniff Mode Explained.
76 (4C)
1
4000
0
Sniff Mode /
Power Saving
Sniff Maximum Interval in units of milliseconds.
The value stores in an 8 bit number and so a non-linear
algorithm converts between the value to the 8 bit number.
This means writing and reading may yield differing values.
See section Sniff Mode Explained.
80 (50)
100
0
7500
0
UART Comms
UART latency time in microseconds.
In a connection, the data pump waits for X bytes
(specified by SReg 11) before transferring the data to the
air-side. In the event that the host sends fewer than X
bytes this has the potential of those bytes never being
transmitted.
Therefore, to cater for that scenario a timer detects how
long they sat in the buffer and if too long, send those
bytes air-side anyway. How long to wait is specified by
this S register. The timer starts once when a byte arrives
in an empty buffer, not every time a byte arrives in the
buffer.