Development Support; Serial Wire Jtag Debug Port (Swj-Dp); Embedded Trace Macrocell - STMicroelectronics STM32L162RC Manual

Ultra-low-power 32-bit mcu arm-based cortex -m3, 256kb flash, 32kb sram, 8kb eeprom, lcd, usb, adc, dac, aes

Table of Contents

STM32L162VC, STM32L162RC

3.20

Development support

3.20.1

The ARM SWJ-DP interface is embedded, and is a combined JTAG and serial wire debug

port that enables either a serial wire debug or a JTAG probe to be connected to the target.

The JTAG JTMS and JTCK pins are shared with SWDAT and SWCLK, respectively, and a

specific sequence on the JTMS pin is used to switch between JTAG-DP and SW-DP.

The JTAG port can be permanently disabled with a JTAG fuse.

3.20.2

The ARM

data flow inside the CPU core by streaming compressed data at a very high rate from the

STM32L162xC device through a small number of ETM pins to an external hardware trace

port analyzer (TPA) device. The TPA is connected to a host computer using USB, Ethernet,

or any other high-speed channel. Real-time instruction and data flow activity can be

recorded and then formatted for display on the host computer running debugger software.

TPA hardware is commercially available from common development tool vendors. It

operates with third party debugger software tools.

Embedded Trace Macrocell provides a greater visibility of the instruction and

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