Описание
The LPC178x/7x is an ARM Cortex-M3 based microcontroller for embedded applications requiring a high level of integration and low power dissipation. The ARM Cortex-M3 is a next generation core that offers better performance than the ARM7 at the same clock rate and other system enhancements such as modernized debug features and a higher level of support block integration. The ARM Cortex-M3 CPU incorporates a 3-stage pipeline and has a Harvard architecture with separate local instruction and data buses, as well as a third bus with slightly lower performance for peripherals. The ARM Cortex-M3 CPU also includes an internal prefetch unit that supports speculative branches. The LPC178x/7x adds a specialized flash memory accelerator to accomplish optimal performance when executing code from flash. The LPC178x/7x operates at up to 120 MHz CPU frequency.
- Functional replacement for the LPC23xx and LPC24xx family devices.
- System:
- ARM Cortex-M3 processor, running at frequencies of up to 120 MHz. A Memory Protection Unit (MPU) supporting eight regions is included.
- ARM Cortex-M3 built-in Nested Vectored Interrupt Controller (NVIC).
- Multilayer AHB matrix interconnect provides a separate bus for each AHB master. AHB masters include the CPU, USB, Ethernet, and the General Purpose DMA controller. This interconnect provides communication with no arbitration delays unless two masters attempt to access the same slave at the same time.
- Split APB bus allows for higher throughput with fewer stalls between the CPU and DMA. A single level of write buffering allows the CPU to continue without waiting for completion of APB writes if the APB was not already busy.
- Cortex-M3 system tick timer, including an external clock input option.
- Standard JTAG test/debug interface as well as Serial Wire Debug and Serial WireTrace Port options.
- Embedded Trace Macrocell (ETM) module supports real-time trace.
- Boundary scan for simplified board testing.
- Non-maskable Interrupt (NMI) input.
- Memory:
- Up to 512 kB on-chip flash program memory with In-System Programming (ISP) and In-Application Programming (IAP) capabilities. The combination of an enhanced flash memory accelerator and location of the flash memory on the CPU local code/data bus provides high code performance from flash.
- Up to 96 kB on-chip SRAM includes: 64 kB of main SRAM on the CPU with local code/data bus for high-performance CPU access. Two 16 kB peripheral SRAM blocks with separate access paths for higher throughput. These SRAM blocks may be used for DMA memory as well as for general purpose instruction and data storage.
- Up to 4032 byte on-chip EEPROM.
