Texas Instruments SimpleLink CC2620 Technical Reference Manual page 1282

AUX – Sensor Controller Registers
17.7.5.9 PRECTL Register (Offset = 20h) [reset = 1Fh]
PRECTL is shown in
Prescaler Control
The prescaler can be used to count events that are faster than the AUX clock speed. It can be used
standalone or as a start/stop source for the TDC by configuring TRIGSRC.START_SRC and
TRIGSRC.STOP_SRC to TDC_PRE. When counting fast signals with the TDC that are faster than 1/10th
of the clock frequency of AUX it is recommended to use the prescaler.
31 30
23 22
15 14
7 6
RESET_N RATIO
R/W-0h R/W-0h
Bit Field
31-8 RESERVED
7 RESET_N
6 RATIO
5 RESERVED
1282
AUX – Sensor Controller with Digital and Analog Peripherals
Figure 17-54 and described in
Figure 17-54. PRECTL Register
29 28
RESERVED
21 20
RESERVED
13 12
RESERVED
5 4
RESERVED
R-0h
Table 17-77. PRECTL Register Field Descriptions
Type Reset
R 0h
R/W 0h
R/W 0h
R 0h
Copyright © 2015, Texas Instruments Incorporated
Table 17-77.
27 26
R-0h
19 18
R-0h
11 10
R-0h
3 2
SRC
R/W-1Fh
Description
Software must not rely on the value of a reserved. Writing any other
value than the reset value may result in undefined behavior.
Prescaler reset control
0: Prescaler is held in reset
1: Prescaler is not held in reset
Prescaler ratio. This controls how often an event is generated on the
TDC_PRE line. After the prescaler is reset the event output
TDC_PRE is 0.
0h = Prescaler divides by 16. A rising edge on the output is
generated for every 16 rising edges of the input (the output toggles
on every 8th rising edge of the input).
1h = Prescaler divides by 64. A rising edge on the output is
generated for every 64 rising edges of the input (the output toggles
on every 32th rising edge of the input).
Software must not rely on the value of a reserved. Writing any other
value than the reset value may result in undefined behavior.
SWCU117C – February 2015 – Revised September 2015
www.ti.com
25 24
17 16
9 8
1 0
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