EM3591-RTR datasheet(34/59 Pages) SILABS

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EM359x

Rev 1.0



Supports incremental (quadrature) encoders and Hall sensors for positioning applications.



Trigger input for external clock or cycle-by-cycle current management.

Refer to chapter 10 in the Ember EM359x Reference Manual for more information.

4.6.5. Analog-to-Digital Converter (ADC)

The EM359x ADC is a first-order sigma-delta converter with the following features:



Resolution of up to 14 bits



Sample times as fast as 5.33 µs (188 kHz)



Differential and single-ended conversions from six external and four internal sources



One voltage range (differential): -VREF to +VREF



Choice of internal or external VREF



internal VREF may be output to PB0 or external VREF may be derived from PB0



Digital offset and gain correction



Dedicated DMA channel with one-shot and continuous operating modes

Refer to chapter 11 in the Ember EM359x Reference Manual for more information.

4.7. Debugging

The EM359x utilizes standard Serial Wire and JTAG interfaces for powerful software debugging and programming

of the ARM® CortexTM-M3 core. The EM359x integrates the standard ARM® system debug components: Flash

Patch and Breakpoint (FPB), Data Watchpoint and Trace (DWT), and Instrumentation Trace Macrocell (ITM) as

well as the advanced Embedded Trace Macrocell (ETM).

4.7.1. Trace Port Interface Unit (TPIU)

The EM359x integrates the standard ARM® Trace Port Interface Unit (TPIU). The TPIU receives a data stream

from the on-chip trace data generated by the standard ARM® Instrument Trace Macrocell (ITM) and ARM®

Embedded Trace Macrocell (ETM), buffers the data in a FIFO for the ITM and FIFO for the ETM, formats the data,

and serializes the data to be sent off chip through alternate functions of the GPIO.

Refer to chapter 12 in the Ember EM359x Reference Manual for more information.

4.7.2. Instrumentation Trace Macrocell (ITM)

The EM359x integrates the standard ARM® Instrumentation Trace Macrocell (ITM). The ITM is an application-

driven trace source that supports printf style debugging to trace software events and emits diagnostic system

information from the ARM® Data Watchpoint and Trace (DWT). Software using the ITM generates Software

Instrumentation Trace (SWIT). In addition, the ITM provides coarse-grained timestamp functionality.

Refer to chapter 13 in the Ember EM359x Reference Manual for more information.

4.7.3. Embedded Trace Macrocell (ETM)

The EM359x integrates the standard ARM® Embedded Trace Macrocell (ETM) version 3.4. The ETM is a powerful

debug component that enables reconstruction of program execution. It is designed as a high-speed, low-power

debug tool that only supports instruction trace.

Refer to chapter 14 in the Ember EM359x Reference Manual for more information.

4.7.4. Data Watchpoint and Trace (DWT)

The EM359x integrates the standard ARM® Data Watchpoint and Trace (DWT). The DWT provides hardware

support for profiling and debugging functionality. The DWT offers the following features:



PC sampling



Comparators to support:



Watchpoints – enters debug state



Data tracing



Cycle count matched PC sampling



Exception trace support



Instruction cycle count calculation support

Refer to chapter 15 in the Ember EM359x Reference Manual for more information.

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