# Hardware Interface Circuits (HICs)

| HIC                           | Core |  Freq.  |  RAM   |  ROM   | USB |
|-------------------------------|:----:|--------:|-------:|-------:|:---:|
| [k20dx](k20dx.md)             |  M4  |  48 MHz |  16 KB | 128 KB |  FS |
| [k26f](k26f.md)               |  M4  | 120 MHz | 256 KB | 256 KB |  HS |
| [kl26z](kl26z.md)             |  M0+ |  48 Mhz |  16 KB | 128 KB |  FS |
| [kl27z](kl27z.md)             |  M0+ |  48 Mhz |  32 KB | 128 KB |  FS |
| [lpc11u35](lpc11u35.md)       |  M0  |  48 Mhz |  12 KB |  64 KB |  FS |
| [lpc4322](lpc4322.md)         |  M4  | 120 MHz | 256 KB | 256 KB |  HS |
| [lpc55xx](lpc55xx.md)         |  M33 |  96 MHz | 272 KB | 320 KB |  HS |
| [max32625](max32625.md)       |  M4  |  96 MHz | 160 KB | 512 KB |  FS |
| [nrf52820](nrf52820.md)       |  M4  |  64 MHz |  32 KB | 256 KB |  FS |
| [sam3u2c](sam3u2c.md)         |  M3  |  96 MHz |  32 KB | 128 KB |  HS |
| [stm32f103xb](stm32f103xb.md) |  M3  |  72 Mhz |  20 KB | 128 KB |  FS |