The Compute Module is built around a Broadcom BCM2711 with a 1.5-GHz, 64-bit, quad-core Arm Cortex-A72 processor and up to 8 GB of LPDDR4-3200 DRAM plus 32 GB of eMMC flash memory. It can support dual-band, 802.11 b/g/n/ac Wi-Fi and Bluetooth 5.0. The RP2040 is a 133-MHz, 32-bit, dual-core Arm Cortex-M0+.
The platform also comes equipped with 10/100 and 1 G Ethernet ports, dual USB 2.0 ports, dual MicroSD slots, and an M.2 PCIe SSD socket. The dual MicroSD slots make it easier to implement upgrade and fallback. In addition, there’s support for the Zymbit Secure Compute Module, a hardened form of the Raspberry Pi Compute Module.
The Strato Pi Max has four slots. Versions are available with fewer slots, which means a corresponding size reduction (Fig. 3). The expansion bus includes USB, I2C, SPI, and GPIO interfaces. The current crop of expansion modules features digital and serial IO as well as a UPS/external battery interface with optional power outputs. Analog, communication, and other expansion options are on the drawing board.
