PIC32CM5164LS60048T-I/U5B
PIC32CM5164LS60048T-I/U5B - Secure Cortex-M23 MCU, 512KB Flash | Microchip
The Microchip Technology PIC32CM5164LS60048T-I/U5B is a 32-bit secure microcontroller built on the Arm Cortex-M23 processor core with 512 KB of Flash and 64 KB of SRAM, housed in a 48-pin VQFN package with an exposed thermal pad. The PIC32CM LS60 family integrates hardened security features including Trust Platform ATECC608, Arm TrustZone technology, immutable secure boot, and secure key storage, while delivering ultra-low-power operation, advanced touch sensing, and smart analog integration in a single device.
A secure MCU is a microcontroller that integrates hardware root-of-trust, cryptographic accelerators, secure boot, and tamper detection directly into the silicon so that firmware, keys, and runtime data can be protected against physical and remote attacks. Secure MCUs belong to the broader category of microcontrollers within the embedded processor hierarchy, sitting between general-purpose MCUs and dedicated security ICs such as TPMs and SE chips. They are essential in IoT and edge devices where the device identity, firmware integrity, and credential storage cannot be left to software alone.
Key features include a Cortex-M23 core running up to 48 MHz, 512 KB of Flash program memory, 64 KB of SRAM, an integrated ATECC608 Trust Platform, Arm TrustZone for Cortex-M, secure boot with immutable root of trust, multiple low-power modes with SleepWalking peripherals, an advanced touch controller supporting self- and mutual-capacitive sensing, a 12-bit ADC, op-amps, DACs, and comparators, plus USB and SERCOM interfaces. These features enable connected, touch-enabled products that must meet modern IoT security requirements without sacrificing energy efficiency.
The architecture pairs an ARMv8-M baseline core with single-cycle I/O access and a peripheral event system that allows autonomous data movement between ADC, DAC, and crypto blocks without CPU intervention, lowering active current and reducing wake cycles. Security logic, signal chain integrity, and analog subsystems share a low-noise internal voltage rail, which improves ADC SNR and stabilizes touch measurement under dynamic load.
Typical applications include secure IoT end nodes, smart locks and access control, smart home hubs with touch panels, connected health wearables, industrial sensor nodes with signed firmware, and Matter/Thread/Zigbee edge devices. Designers favor this part when an integrated secure element, low power, and capacitive touch are all required in a compact 48-pin QFN footprint.
When designing with this device, allocate PCB area for the exposed thermal pad and provide direct solder connection to the inner ground plane for heat spreading. Place the ATECC608 I2C lines as short as possible to the MCU and add 4.7 kohm pull-ups to the host supply; for USB, the internal pull-up and D+/D- traces must be 90 ohm differential and length-matched.
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