Kamis, 05 Mei 2011

MICROCONTROLLER LPC1114 FEATURES


MICROCONTROLLER LPC1114 FEATURES:
LPC1114 Cortex-M0, up to 50 Mhz
32 kB Flash, 8kB SRAM,
UART RS-485, two SSP, I2C/Fast+
42 GPIO pins,
4 TIMERS/COUNETRS, CAPTURE,
WDT
Serial Wire Debug.
High-current output driver (20 mA) on one pin.
High-current sink drivers (20 mA) on two I2C-bus pins in Fast-mode Plus.
Integrated Power Management Unit, Three reduced power modes: Sleep, Deep-sleep, and Deep power-down.
Single 3.3 V power supply (2.0 V to 3.6 V).
10-bit ADC with input multiplexing among 8 pins.
GPIO pins can be used as edge and level sensitive interrupt sources.

BOARD FEATURES:
MCU: LPC1114 Cortex-M0, up to 50 Mhz, 32 kB Flash, 8kB SRAM, UART RS-485, two SSP, I2C/Fast+, ADC
Power supply circuit
Power-on led
USB connector only for power supply, not USB functionality
Debug interface – SWD (Serial Wire Debug)
UEXT connector
Eight user leds
Two user buttons
Reset button
Prototype area
FR-4, 1.5 mm, soldermask, component print
Dimensions:80x50mm (3.15 x 1.97")

A microcontroller (sometimes abbreviated ┬ÁC, uC or MCU) is a small computer on a single integrated circuit containing a processor core, memory, and programmable input/output peripherals. Program memory in the form of NOR flash or OTP ROM is also often included on chip, as well as a typically small amount of RAM. Microcontrollers are designed for embedded applications, in contrast to the microprocessors used in personal computers or other general purpose applications.

Microcontrollers must provide real time (predictable, though not necessarily fast) response to events in the embedded system they are controlling. When certain events occur, an interrupt system can signal the processor to suspend processing the current instruction sequence and to begin an interrupt service routine (ISR, or "interrupt handler"). The ISR will perform any processing required based on the source of the interrupt before returning to the original instruction sequence. Possible interrupt sources are device dependent, and often include events such as an internal timer overflow, completing an analog to digital conversion, a logic level change on an input such as from a button being pressed, and data received on a communication link. Where power consumption is important as in battery operated devices, interrupts may also wake a microcontroller from a low power sleep state where the processor is halted until required to do something by a peripheral event.

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