توضیحات
ميکروکنترلر نوعي ريزپردازنده است که داراي حافظه RAM ROM، تايمر، پورت‌هاي ورودي و خروجي (I/O) و درگاه ترتيبي (Serial Port پورت سريال)، درون خود تراشه است، و مي‌تواند به تنهايي ابزارهاي ديگر را کنترل کند. به عبارت ديگر يک ميکروکنترلر، مدار مجتمع کوچکي است که از يک CPU کوچک و اجزاي ديگري مانند تايمر، درگاه‌هاي ورودي و خروجي آنالوگ و ديجيتال و حافظه تشکيل شده‌است.
در واقع يک ريزپردازنده درون ميکروکنترولر قرار گرفته‌است که با استفاده از آن مي‌تواند محاسبات منطقي و حسابي را انجام دهد.
وجود RAM و ROM و پورت‌هاي I/O در ميکروکنترلرها آن‌ها را يک انتخاب ايده ال براي کاربردهايي مي‌کند که قيمت و اندازه در آن‌ها مهم است. در بسياري از کاربردها مثل کنترل از راه دور تلويزيون نيازي به محاسبات سنگين وجود ندارد. در اين گونه موارد و بسياري ديگر از کاربردها فضاي مورد استفاده توان مصرفي و قيمت هر واحد مهم تر از قدرت محاسبات است.
Description
The LPC1788 is a Cortex-M3 microcontroller for embedded applications featuring a high level of integration and low power consumption at frequencies of 120 MHz. Features include 512 kB of flash memory, 96 kB of data memory, Ethernet, USB 2.0 Host/OTG/Device , 8-channel DMA controller, 5 UARTs, 2 CAN channels, 3 SSP/SPI, 3 I2C, I2S, 8-channel 12-bit ADC, 10-bit DAC, QEI, LCD controller, SD/MMC interface, motor control PWM, 4 general purpose timers, 6-output general purpose PWM, ultra-low power Real-Time Clock with separate battery supply, and up to 165 general purpose I/O pins.
Features and benefits
Functional replacement for LPC23xx and 24xx family devices
ARM Cortex-M3 processor, running at frequencies of up to 120 MHz
ARM Cortex-M3 built-in Nested Vectored Interrupt Controller (NVIC)
Multilayer AHB matrix interconnect provides a separate bus for each AHB master
Split APB bus allows for higher throughput
Cortex-M3 system tick timer, including an external clock input option
Standard JTAG test/debug interface, Serial Wire Debug and Serial WireTrace Port
Emulation trace module supports real-time trace
Boundary scan for simplified board testing
Non-maskable Interrupt (NMI) input
512 kB on-chip flash program memory
96 kB on-chip SRAM
4 kB on-chip EEPROM
In-System Programming (ISP) and In-Application Programming (IAP) capabilities
LCD controller, supporting both STN and TFT displays
External Memory Controller (EMC)
Eight channel General Purpose DMA controller (GPDMA)
Ethernet MAC with MII/RMII interface and associated DMA controller
USB 2.0 full-speed dual port device/host/OTG controller with on-chip PHY and DMA
Five UARTs with fractional baud rate generation
Three SSP controllers with FIFO and multi-protocol capabilities
Three enhanced I2C-bus interfaces
I2S (Inter-IC Sound) interface for digital audio input or output
CAN controller with two channels
SD/MMC memory card interface
Up to 165 General Purpose I/O (GPIO) pins
Two external interrupt inputs configurable as edge/level sensitive
Four general purpose timers/counters
Quadrature encoder interface that can monitor one external quadrature encoder
Two standard PWM/timer blocks with external count input option
Real-Time Clock (RTC) with a separate power domain
Windowed Watchdog Timer (WWDT)
12-bit Analog-to-Digital Converter (ADC) with conversion rates up to 400 kHz
10-bit Digital-to-Analog Converter (DAC)
Four reduced power modes: Sleep, Deep-sleep, Power-down, and Deep power-down
Wake-up Interrupt Controller (WIC)
Processor wake-up from Power-down mode via any interrupt
Brownout detect with separate threshold for interrupt and forced reset
On-chip Power-On Reset (POR)
On-chip crystal oscillator with an operating range of 1 MHz to 25 MHz
12 MHz Internal RC oscillator (IRC) trimmed to 1% accuracy
Unique device serial number for identification purposes
Single 3.3 V power supply (2.4 V to 3.6 V)
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