STM32L151CBU6TTR View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
STM32L151CBU6TTR
STMicroelectronics
STM32L151CBU6TTR Datasheet PDF : 133 Pages
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Functional overview
STM32L151x6/8/B STM32L152x6/8/B
3.17
CRC (cyclic redundancy check) calculation unit
The CRC (cyclic redundancy check) calculation unit is used to get a CRC code from a 32-bit
data word and a fixed generator polynomial.
Among other applications, CRC-based techniques are used to verify data transmission or
storage integrity. In the scope of the EN/IEC 60335-1 standard, they offer a means of
verifying the Flash memory integrity. The CRC calculation unit helps compute a signature of
the software during runtime, to be compared with a reference signature generated at link-
time and stored at a given memory location.
3.18
Development support
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.
Embedded Trace Macrocellâ„¢
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
STM32L151x6/8/B and STM32L152x6/8/B 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.
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DocID17659 Rev 12
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