The silicon we run on.
php-baremetal targets microcontrollers, not one vendor — a new chip family is a directory, not an engine change. Here's what runs today, the dev-boards each chip is verified on, and what's on the roadmap.
Espressif
SupportedThe first silicon php-baremetal runs on. Cheap, widely available, and with enough PSRAM on the high end to run full frameworks.
ESP32-P4
Dual-core RISC-V up to 400 MHz, up to 32 MB PSRAM. The comfortable framework tier — stock Laravel and Symfony over HTTP.
ESP32-S3
Dual-core Xtensa LX7 @ 240 MHz, 8 MB PSRAM. Runs plain apps and a live web server.
NXP
PlannedCrossover MCUs (i.MX RT): Arm Cortex-M7 up to ~1 GHz with external SDRAM/HyperRAM. MCU model, framework-tier RAM — a natural next target.
i.MX RT
Crossover MCU, XIP from external flash, no MMU. External RAM is the point — several MB for the framework tier.
STMicroelectronics
PlannedSTM32H7 with external SDRAM: Arm Cortex-M7 with a double-precision FPU and a huge ecosystem. A strong candidate for the framework tier.
STM32H7
Cortex-M7 with an FMC for external SDRAM (8–32 MB). FreeRTOS, FatFs, lwIP and mbedTLS are all readily available.
Candidate boards to be selected.
Raspberry Pi
PlannedRP2350 with QSPI PSRAM: Arm Cortex-M33 (or its RISC-V cores). The engine and small apps fit; frameworks are tight, like the S3.
RP2350
Dual-architecture MCU with external PSRAM support (8 MB on some boards). Engine-tier target.
Candidate boards to be selected.
Want a chip supported, or a board tested?
A new family is a directory under boards/, not an engine change.
If you have the hardware — or make it — get in touch and we'll bring it up.