STM32L151XE datasheet(31/136 Pages) STMICROELECTRONICS

Part #	STM32L151XE

Description	Ultra-low-power 32-bit MCU Arm®-based Cortex®-M3 with 512KB Flash, 80KB SRAM, 16KB EEPROM, LCD, USB, ADC, DAC

PDF	136 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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31 / 136 page

DS10002 Rev 10

31/136

STM32L151xE STM32L152xE

Functional overview

3.19

Development support

3.19.1

Serial wire JTAG debug port (SWJ-DP)

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.

3.19.2

Embedded Trace Macrocell™

The Arm® Embedded Trace Macrocell provides a greater visibility of the instruction and data

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

STM32L151xE and STM32L152xE 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.

STM32L151XE Datasheet(PDF) 31 Page - STMicroelectronics