The CP3UB17 is a reconfigurable connectivity processor from National Semiconductor Corporation. It features a powerful RISC core, on-chip SRAM and Flash memory, hardware communications peripherals, external bus, software resources, and so on.
The CP3UB17 is a reprogrammable connectivity processor that combines a RISC core, on‑chip SRAM and Flash, and a wide range of communications peripherals such as USB, ACCESS.bus, SPI, UART, and an advanced audio interface. It includes extensive power‑management, clocking, and timing modules, making it suitable for many embedded applications.
National Semiconductor supplies a complete development environment for the CP3UB17, including an operating system, peripheral drivers, reference designs, and tools like IAR Embedded Workbench, iSYSTEM winIDEA, and iC3000 Active Emulator. The handbook details the CPU architecture, memory organization, I/O configuration, and peripheral modules, as well as pin assignments and mechanical dimensions.
| CPU operating frequency | 0 – 24 MHz |
|---|---|
| Instruction cycle time | 41.7 ns (minimum) |
| Peripheral interrupts | 30 independently vectored |
| Flash program memory | 256 KB reprogrammable |
| Flash data memory | 8 KB |
| Static RAM | 10 KB |
| External memory address space | up to 8 MB |
| General‑purpose I/O pins | up to 37 |
| USB interface | Full‑speed USB node with seven endpoint FIFOs |
The CPU can operate from 0 MHz up to 24 MHz.
It includes 256 KB of reprogrammable Flash program memory.
The device provides up to 37 configurable I/O pins.