Описание
The LPC185x/3x/2x/1x are ARM Cortex-M3 based microcontrollers for embedded applications. The ARM Cortex-M3 is a next generation core that offers system enhancements such as low power consumption, enhanced debug features, and a high level of support block integration. The LPC185x/3x/2x/1x operate at CPU frequencies of up to 180 MHz. The ARM Cortex-M3 CPU incorporates a 3-stage pipeline and uses a Harvard architecture with separate local instruction and data buses as well as a third bus for peripherals. The ARM Cortex-M3 CPU also includes an internal prefetch unit that supports speculative branching. The LPC185x/3x/2x/1x include up to 1 MB of flash and 136 kB of on-chip SRAM, 16 kB of EEPROM memory, a quad SPI Flash Interface (SPIFI), a State-configurable Timer/PWM (SCTimer/PWM) subsystem, two High-speed USB controllers, Ethernet, LCD, an external memory controller, and multiple digital and analog peripherals.
- Processor core
- ARM Cortex-M3 processor (version r2p1), running at CPU frequencies of up to 180 MHz.
- ARM Cortex-M3 built-in Memory Protection Unit (MPU) supporting eight regions.
- ARM Cortex-M3 built-in Nested Vectored Interrupt Controller (NVIC).
- Non-maskable Interrupt (NMI) input.
- JTAG and Serial Wire Debug, serial trace, eight breakpoints, and four watch points.
- Enhanced Trace Module (ETM) and Enhanced Trace Buffer (ETB) support.
- System tick timer.
- On-chip memory
- Up to 1 MB on-chip dual bank flash memory with flash accelerator.
- 16 kB on-chip EEPROM data memory.
- 136 kB SRAM for code and data use.
- Multiple SRAM blocks with separate bus access.
- 64 kB ROM containing boot code and on-chip software drivers.
- 64 bit+ 256 bit of One-Time Programmable (OTP) memory for general-purpose use.
- Clock generation unit
- Crystal oscillator with an operating range of 1 MHz to 25 MHz.
- 12 MHz internal RC oscillator trimmed to 3 % accuracy over temperature and voltage (1.5 % accuracy for Tamb = 0 °C to 85 °C).
- Ultra-low power RTC crystal oscillator.
- Three PLLs allow CPU operation up to the maximum CPU rate without the need for a high-frequency crystal. The second PLL can be used with the High-speed USB, the third PLL can be used as audio PLL.
