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16.5.4 Radio Control Registers
Nine addresses correlate to radio control functions. The Correlation Time Setup Register and Correlation
Time Stamp Register are write and read registers associated with one address. Similarly, the RF Control
Register and RF Status Register are write and read registers associated with one address.
16.5.4.1 Correlation Time Setup Register
The write-only Correlation Time Setup Register is used when the unit is in slave mode to adjust the
synchronization with the master clock. When the unit detects a valid access code, ideally 64 µs have passed
since the last master clock tick, however because of delays through the radio and other external devices,
the time may not be exactly 64 µs. The Correlation Time Setup Register can be used to adjust the time
slightly. Reading address 0x00216040 returns the Correlation Time Stamp Register (see section 16.5.4.2).
The Correlation Time Setup Register bits are explained in Table 16-28 on page 16-43.
CORRELATION_TIME_
SETUP
BIT
31
30
29
TYPE
r
r
r
0
0
0
RESET
BIT
15
14
13
TYPE
r
r
r
0
0
0
RESET
Table 16-28. Correlation Time Setup Register Description
Name
Reserved
Bits 31–10
EST_PRELOAD_TIME
Bits 9–0
MOTOROLA
Correlation Time Setup Register
28
27
26
25
r
r
r
r
0
0
0
0
12
11
10
9
r
r
r
w
0
0
0
1
Reserved—These bits are reserved and should read 0.
Set Correlation Time—Holds the preload time value. The EST_PRELOAD_TIME value
is loaded into the ESTIMATEDCLK counter when the trigger is asserted during
correlation in slave mode.
Bluetooth Accelerator (BTA)
24
23
22
21
20
r
r
r
r
r
0
0
0
0
0
0x0000
8
7
6
5
4
EST_PRELOAD_TIME
w
w
w
w
w
0
0
0
0
0
0x0201
Description
Programming Model
Addr
0x00216040
19
18
17
16
r
r
r
r
0
0
0
0
3
2
1
0
w
w
w
w
0
0
0
1
16-43
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