Timers; Rf Test Modes - Silicon Laboratories EFR32xG14 Wireless Gecko Reference Manual

2.16 Timers

EFR32 includes multiple timers, as can be seen from
Timer
RTCC
PROTIMER
TIMER
WTIMER
Systick timer
WDOG
LETIMER
Advanced interconnect features allows synchronization between timers. This includes:
• Start / stop any high frequency timer synchronized with the RTCC
• Trigger RSM state transitions based on compare timer compare match, for instance to provide clock cycle accuracy on frame trans-
mit timing

2.17 RF Test Modes

EFR32 supports a wide range of RF test modes typically used for characterization and regulation compliance testing, including:
• Unmodulated carrier transmit
• Modulated carrier transmit, with internal configurable pseudo random data generator
• Continuous data reception for Bit Error Rate (BER) measurements
• Storing of raw receiver data to RAM
• Transmit of raw frequency data from RAM
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Table 2.3 EFR32 Timers Overview on page
Table 2.3. EFR32 Timers Overview
Number of instances
1 (2)
1
2
2
1
1
1
36.
Typical clock source
Low frequency (LFXO or
LFRCO)
High frequency (HFXO or
HFRCO)
High frequency (HFXO or
HFRCO)
High frequency (HFXO or
HFRCO)
High frequency (HFXO or
HFRCO)
Low frequency (LFXO, LFRCO
or ULFRCO)
Low frequency (LFXO, LFRCO
or ULFRCO)
Reference Manual
System Overview
Overview
32 bit Real Time Counter and
Calendar, typically used to ena-
ble wakeup on compare match.
A second RTC module is used
by the radio software drivers for
accurately timing inactive peri-
ods in the radio communication
protocol.
16+16+32 bit Protocol Timer,
typically used to accurately con-
trol detailed RF protocol timing
in transmit and receive modes.
16 bit general purpose timer.
32 bit general purpose timer.
32 bit systick timer integrated in
the Cortex-M4. Typically used
as an Operating System timer.
Watch dog timer. Once enabled,
this module must be periodically
accessed. If not, this is consid-
ered an error and the EFR32 is
reset in order to recover the
system.
Low energy general purpose
timer.
Rev. 1.1 | 36