Texas Instruments MSPM33C321A is a new Arm Cortex-M33 mixed-signal microcontroller clocked at 160MHz, with up to 1MB of flash with ECC and 256kB SRAM with ECC, and a range of digital and analog peripherals.
Those include 9.4MSPS dual SAR ADCs and comparators, QSPI, UART, SPI, I2C, I2S/TDM, & CAN-FD interfaces, and the company also highlights a separate VBAT power domain with RTC, integrated watchdog, and tamper I/O, as well as low power consumption with a 16µA standby current with 64kB SRAM and CPU/register retention. The MSPM33C321A also has a little brother with 512KB flash called the MSPM33C3219.
MSPM33C321A specifications:
- MCU core – 32-bit Arm Cortex-M33 CPU @ 160MHz with TrustZone, FPU, and DSP extensions
- Memory – 256kB of SRAM with ECC
- Storage
- Up to 1MB of flash memory with error correction code (ECC); dual-bank with address swap
- EEPROM operations using 32kB high-endurance data flash
- Quad SPI (QSPI) for external memory up to 20Mbytes/s
- Communication interfaces
- 2x Controller Area Network (CAN) interfaces support CAN 2.0A/B and CAN-FD
- 3x configurable serial interfaces supporting UART (LIN) or I2C (SMBus/PMBus)
- 4 configurable serial interfaces supporting UART, I2C, or SPI
- 2x dedicated I2C interfaces support up to FM+ (1Mbit/s), SMBus/PMBus
- 1x dedicated SPI interface
- 1x dedicated UART interface supporting LIN, IrDA, DALI, Smart Card, Manchester
- 2x digital audio interfaces support full duplex I2S and TDM (16-slots)
- Digital peripherals
- Up to 93x GPIOs
- 2x DMA controllers with 16 total channels
- 9x timers support up to 30 PWM channels
- 2x 16-bit advanced timers with deadband, fault handling, and complementary pair
- 4x 16-bit general-purpose timers
- 1x 32-bit general-purpose timer
- 2x 16-bit general-purpose timer supporting quadrature encoder interface
- One window-watchdog timer
- CRC16/32 module
- Analog peripherals
- 2x high-speed 9.4-Msps 12-bit ADCs with up to 36 external channels
- 2x high-speed/low-power comparators (COMP)
- 2x externally available 8-bit DACs
- Configurable 1.4V or 2.5V internal shared voltage reference (VREF)
- Integrated temperature & supply monitor
- Security
- Immutable Root of Trust (RoT) in ROM, supports secure firmware installation, boot and key provisioning
- Global Security Controller with dynamic access controls for flash, SRAM, and peripherals
- AES256 hardware accelerator with GCM
- SHA256 hardware accelerator with HMAC
- Public Key Accelerator (PKA)
- 32-bit true random number generator (TRNG)
- VBAT island (auxiliary supply) through dedicated VBAT pin
- Real-time clock (RTC)
- Three tamper detection IO with timestamp
- Independent watchdog timer (IWDT)
- 32B backup memory
- Clock system
- Internal 32MHz oscillator (SYSOSC)
- Phase-locked loop (PLL)
- Internal 32kHz oscillator (LFOSC)
- External 4 to 48MHz crystal oscillator (HFXT)
- External 32kHz crystal oscillator (LFXT)
- External clock input
- Debugging – 2-pin serial wire debug (SWD)
- Supply Voltage – 1.71 V to 3.6 V
- Low-power modes and power consumption
- RUN: 207µA/MHz (CoreMark)
- STANDBY: 16µA with CPU execution resume and 64kB SRAM retention
- SHUTDOWN: <100nA with IO wake-up capability
- Packages
- 48-pin VQFN (0.5mm pitch)
- 64-pin LQFP (0.5mm pitch)
- 80-pin LQFP (0.5mm pitch)
- 100-pin LQFP (0.4mm & 0.5mm pitch)
- 100-pin nFBGA (0.8mm pitch)
- Temperature Range – –40°C up to 125°C
The Cortex-M33 microcontroller is supported by the MSPM33 Software Development Kit (SDK) and the Code Composer Studio IDE. The company also provides the LaunchPad EVM LP-MSPM33C321A LaunchPad development kit with an onboard XDS110 debug probe, optional EnergyTrace technology for ultra-low debugging, 80-pin BoosterPack headers, a Mikrobus connector, two buttons, an RGB LED, a red LED, and an OLED. External REF6033 and external OPA365 (unpopulated by default) for ADC evaluation are also supported.
Texas Instruments has yet to officially announce the microcontroller, and instead, I found it through a LinkedIn post by Rodney Farrow, Senior Application Engineer at Texas Instruments. This may explain why I didn’t find proper photos of the board, and only a blurry render.
Low-cost 100-pin package devices are reported to start at $2.81 per unit for orders of 1,000 units. The LP-MSPM33C321A LaunchPad development kit can be purchased now for $19.50 through the board’s product page, where you’ll also find a user manual and resources to get started. Additional information about the MSPM33C321x microcontrollers themselves can be found on the product page.
Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.
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