SK hynix HMA42GR7AFR4N-TF 16GB DDR4 2133MHz CL15 ECC Registered Dual Rank 1.2V 288-Pin Server RAM
- 16GB
- 288-Pin DDR4 SDRAM
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KEHIPI
Three RP2040 development boards with dual-core 133 MHz processors, 2 MB flash, USB-C, castellated edges for direct soldering and 29 multi-function GPIO pins
The KEHIPI RP2040-Zero is a pico-like microcontroller board built around the Raspberry Pi RP2040 dual-core Arm Cortex-M0+ processor running up to 133 MHz. It provides 264 KB of SRAM and 2 MB of on-board Flash memory for program storage. The castellated module design allows direct soldering to carrier boards for embedded integration. This pack contains three boards for multi-node projects or spares.
The board draws power through a USB-C connector and uses an ME621 low-dropout LDO regulator rated for a maximum current of 800 mA. Low-power sleep and dormant modes are supported by the RP2040 chip to minimise consumption during idle periods. A WS2812 RGB LED provides visual status indication without adding significant load. USB 1.1 device and host support enables simple peripheral communication.
Under continuous operation the dual-core processor maintains its 133 MHz clock while the on-chip temperature sensor allows thermal monitoring in firmware. Eight programmable I/O state machines offload timing-critical tasks from the main cores during sustained workloads. The board exposes 29 multi-function GPIO pins, with 20 available on the edge pinout and nine additional pins via solder points. Accelerated floating-point libraries assist with compute-heavy loops over long runs.
| Brand | waveshare |
|---|---|
| Model | RP2040-Zero-3pcs |
| Part Number | RP2040-Zero-3pcs |
Align the castellated edges on the carrier pads, apply flux, then drag-solder each pad with a fine tip; the 10 solder points include 9 for GPIO so keep the iron moving to avoid bridges
The W25Q16JVUXIQ 2 MB NOR Flash is rated for many erase cycles but will eventually wear out; the ME621 LDO and WS2812 LED are solid-state and typically last the board's life
The ME621 LDO supplies up to 800 mA; sustained 133 MHz operation with active peripherals can approach this ceiling, so thermal throttling or voltage drop occurs before the Flash or SRAM limits
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