![\"NXP](\"https:\/\/www.cnx-software.com\/wp-content\/uploads\/2026\/08\/NXP-MCX-A5-series-block-diagram.jpg\" "\\"NXP")
<\/a><\/p>\nNXP MCX A5 Series (MCXA577) specifications:<\/p>\n
MCU Core<\/p>\n
Arm Cortex-M33 core clocked at up to 240 MHz
\nIncludes FPU, DSP, MPU, and TrustZone support
\nIntegrated SmartDMA co-processor for efficient data handling
\nDelivers 988.8 CoreMark (4.12 CoreMark\/MHz)<\/p>\n
Memory and Storage<\/p>\n
Up to 2 MB dual-bank Flash with ECC and read-while-write support
\n16 KB cache engine
\nUp to 640 KB SRAM, configurable as up to 64 KB RAM with ECC
\n24 KB RAM retained down to VBAT mode
\nROM for Secure Boot
\nFlexSPI interface for external memory with cache<\/p>\n
Networking<\/p>\n
Up to 1x 10\/100Mbps Ethernet MAC (supports MII \/ RMII \/ Ethernet depending on configuration)
\nUp to 1x 10BASE-T1S Digital PHY<\/p>\n
Peripherals<\/p>\n
Up to 134x GPIOs, with up to 4x high-drive 20 mA I\/Os
\nUSB \u2013 USB High-Speed (HS) Host\/Device with an on-chip HS PHY
\nLow-speed I\/Os<\/p>\n
Up to 6x LPUART, 6x LPSPI, and 5x LPI2C Analog peripherals<\/p>\n Up to 2x 16-bit ADCs and up to 2x 12-bit DACs Timers and DMA<\/p>\n Up to 5x 32-bit timers and 2x DMA HMI \u2013 TSI (Touch Sensing Input) and FlexIO interfaces<\/p>\n Security<\/p>\n EdgeLock accelerator with TRNG, PKC (ECC, RSA), and SGI (AES256, SHA-2, PQC, KeyStore) Power<\/p>\n Operating voltage \u2013 1.7V to 3.6V Packages \u2013 WFBGA169, LQFP144, and LQFP100 At the time of writing, NXP lists four SKUs, of which three MCXA577 variants offer the same 240 MHz core, memory, Ethernet, and CAN FD features, and differ mainly in package and GPIO count. The MCXA557VPN keeps the same core and memory but removes the Ethernet MAC, 10BASE-T1S DPHY, and CAN FD.<\/p>\n In terms of software support, the company says the MCXA5 family is supported by NXP\u2019s MCUXpresso ecosystem, which includes SDKs, middleware, security software, Visual Studio Code integration, and LTS software releases. NXP also plans support for the Zephyr RTOS, while selected devices are planned to support Rust.<\/p>\n To simplify development, NXP offers the FRDM-MCXA577 development board for evaluating the MCX A5 family. It is based on the MCXA577 and includes an onboard MCU-Link Lite debugger, standard headers, and support for Arduino, mikroBUS, and Pmod expansion boards. However, detailed information about the board is still limited. While looking for more details, I found a dedicated documentation page<\/a> for the FRDM-MCXA577 dev board that lists support for FreeRTOS, MCUboot, FatFs, FreeMASTER, and Trusted Firmware-M<\/a>, along with the MCXA577 driver API. I also found the FRDM-MCXA577 on the Zephyr Project<\/a>, where support appears to still be under development. As the support pages are still under development, you may notice that different pages use different images, which can be a little confusing. Just a heads-up in case you run into the same issue.<\/p>\n NXP first introduced its MCX family of general-purpose Arm MCUs<\/a> in 2022. The company later added the cost-optimized MCX A14x\/A15x Cortex-M33 MCUs<\/a> in 2024 and the mixed-signal MCX A34<\/a> with a Math Acceleration Unit in 2025, along with the MCX L<\/a>, MCX W<\/a>, and E series.<\/p>\n \n The new MCX A5 extends the A-series with wired industrial connectivity, including an integrated 10BASE-T1S digital PHY, topology discovery, and post-quantum cryptography. Normally, adding 10BASE-T1S would require an external PMD such as the NXP TJF1410<\/a> or Microchip LAN867x\/LAN865x<\/a> Single Pair Ethernet MAC-PHY, along with a separate host MCU. However, the MCX A5 brings these functions into a single MCU and targets industrial edge nodes using interfaces such as RS-485, CAN, or Ethernet.<\/p>\n The MCX A5 family is sampling now, and NXP mentions general availability is expected in Q4 2026. The FRDM-MCXA577 board does not appear to be available at the time of writing. More information about the MCU is available on its product page<\/a> and in the press release<\/a>.<\/p>\n Debashis Das is a technical content writer and embedded engineer with over five years of experience in the industry. With expertise in Embedded C, PCB Design, and SEO optimization, he effectively blends difficult technical topics with clear communication<\/p>\n Support CNX Software! Donate via cryptocurrencies<\/a>, become a Patron<\/a> on Patreon, or purchase goods on Amazon<\/a> or Aliexpress<\/a>. We also use affiliate links in articles to earn commissions if you make a purchase after clicking on those links.<\/p>\n","protected":false},"excerpt":{"rendered":"NXP has introduced the MCX A5 family of Cortex-M33 MCUs, which features a 10\/100Mbps Ethernet MAC and an…\n","protected":false},"author":2,"featured_media":38848,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62],"tags":[16926,4944,25248,22589,22590,25249,25250,25251,6762,2784,25252,166,794,12439,25253],"class_list":["post-38847","post","type-post","status-publish","format-standard","has-post-thumbnail","category-nxp","tag-arm","tag-automation","tag-c-c","tag-cortex-m33","tag-development-board","tag-ethernet","tag-freertos","tag-i3c","tag-industrial","tag-iot","tag-mcu","tag-nxp","tag-security","tag-sensors","tag-zephyr"],"_links":{"self":[{"href":"https:\/\/www.europesays.com\/netherlands\/wp-json\/wp\/v2\/posts\/38847","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/netherlands\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/netherlands\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/netherlands\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/netherlands\/wp-json\/wp\/v2\/comments?post=38847"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/netherlands\/wp-json\/wp\/v2\/posts\/38847\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/netherlands\/wp-json\/wp\/v2\/media\/38848"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/netherlands\/wp-json\/wp\/v2\/media?parent=38847"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/netherlands\/wp-json\/wp\/v2\/categories?post=38847"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/netherlands\/wp-json\/wp\/v2\/tags?post=38847"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nUp to 2x CAN FD interfaces
\nUp to 4x I3C<\/a> interfaces
\neSPI<\/p>\n
\n1x LPCMP (Analog comparator)
\nIntegrated voltage reference (VREF) and temperature sensor<\/p>\n
\nLow-power timer, Wake timer, Micro-tick timer, OS event timer
\nRTC
\n2x Windowed watchdog timers
\nFrequency measurement and PWM \/ event timing resources<\/p>\n
\nSecure boot (with PQC hybrid support), secure firmware update, secure debug, and lifecycle management
\nTargets PSA Level 3 and SESIP Level 3 certifications
\nCode Watchdog, Glikey-protected access s, and passive anti-tamper detection to defend against physical and software attacks<\/p>\n
\n1.2 V independent I\/O supply support
\nPower management system with POR\/LVD\/HVD and LDO
\nMultiple low-power modes with wake-up sources down to deep power-down mode<\/p>\n
\nOperating junction temperature \u2013 -40\u00b0C to 125\u00b0C<\/p>\n<\/a><\/p>\n<\/a><\/p>\n<\/a>Four SKUs: MCXA577VPN, MCXA577VLQ, MCXA577VLL, MCXA557VPN\n<\/p>\n<\/p>\n