Texas Instruments SimpleLink CC2620 Technical Reference Manual page 1272

AUX – Sensor Controller Registers
17.7.5.1 CTL Register (Offset = 0h) [reset = 0h]
CTL is shown in Figure 17-46
Control
31 30 29 28
15 14 13 12
Bit Field
31-2 RESERVED
1-0 CMD
1272
AUX – Sensor Controller with Digital and Analog Peripherals
and described in Table
Figure 17-46. CTL Register
27 26 25 24
RESERVED
R-0h
11 10 9 8
RESERVED
R-0h
Table 17-69. CTL Register Field Descriptions
Type Reset
R 0h
W 0h
Copyright © 2015, Texas Instruments Incorporated
17-69.
23 22 21 20
7 6 5 4
Description
Software must not rely on the value of a reserved. Writing any other
value than the reset value may result in undefined behavior.
TDC command strobes
0h = This command clears STAT.SAT, STAT.DONE and results.
Note: This is not needed as prerequisite for a measurement. Reliable
clear is only ensured from IDLE state
1h = This command makes the TDC FSM start counting
synchronously to the first rising edge that follows a required falling
edge of the start event. This ensures an edge triggered start and is
recommended for frequency measurements. A falling edge of the
start event may be missed if the command is issued close to it in
time, but the TDC will catch later falling edges and ensure that a
measurement starts synchronously to the rising edge of the start
event
2h = This command makes the TDC FSM start and stop counting
asynchronously. TDC measurement may start immediately if start is
high and hence it may not give precise edge to edge measurements.
Only recommended when start pulse is ensured to arrive at least 7
clock periods after the command
3h = This command forces the TDC back to IDLE state
SWCU117C – February 2015 – Revised September 2015
www.ti.com
19 18 17 16
3 2 1 0
CMD
W-0h
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