As hot as the Texas sun
This month, there was nothing hotter than the Texas sun and the NXP K32L availability. The low power MCU family features 72MHz Cortex-M4 and Cortex-M0+ options with up to 1.25MB of Flash and a 7uA leakage with full RAM retention. Other providers focused on not-as-hot variants of existing parts.
We still are encountering missing parts on the website (e.g. we are not able to see ordering parts here: https://www.microchip.com/wwwproducts/en/dsPIC33FJ12GP202). Microchip added over 100 parts mostly variants of ATTiny and PIC16, with also DSPIC33CH and PIC16 VAO parts (Automotive grade).
Nuvoton added a few variants to the existing M452/M480 series, based on a 192MHz Cortex-M4F core.
NXP finally added the K32L family to its portfolio – it was announced back in February this year. The power-efficient K32 MCUs complement the performance efficient LPC5500 MCU series.
The family targets energy efficiency for low duty cycle applications with wide operating voltage range. The K32L3 sports a 72MHz Cortex-M4 core with an optional Cortex-M0+. The family offers up to 1.25MB/384kB Flash/SRAM, 12-bit 1MSPS ADC, 10-bit DAC and comparator, 32-bit PWM timer modules, and an external memory controller for flexible expansion.
Key features of the K32 L3 MCU family include:
- Fast wake-up from 2uA current with partial SRAM retention, and 7uA current with full SRAM retention (3V, 25C, DC-DC)
- Single inductor, multiple output (SIMO) DC-DC, as well as two independent I/O rails, up to 1.8 volts
- As low as 200nA in always-on VBAT mode, with 32K low power RTC oscillator and register retention and four tamper pins for physical tamper protection
- Uncompromised Root-of-Trust (RoT) with authenticated boot, encrypted firmware update and storage of public key hash in one-time programmable (OTP), Hardware acceleration for symmetric (AES-256, DES/3DES) and asymmetric (RSA 4096-bit public key, ECC) cryptography, along with SHA-256 hashing and true random number generator (TRNG) with 512-bits of entropy.
The K32 L3 MCU family is sampling now. The K32L2 only keeps the Cortex-M0+ with Flash options ranging from 64/32 to 512/128 kB of Flash/SRAM.
Renesas removed the S5D3 group (120 MHz, 520kB Flash) from the portfolio.
SiLabs released a new variant in the EZR32HG320 family (sub-GHz, Cortex-M0+ and USB) with a 16 dBm PA.
Cypress released 116 variants of existing families : PSoC4100, PSoC4200.
ST disclosed a few variants of existing parts, nothing earth shaking.
A few new TMS320F2810 parts appeared.
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