dspic 30f4011  microcontroller includes a large 48kB internal flash memory and a wide range of timers together with a number of PWM modules for adjustable motor speed control.

Features of dspic30f4011

• High – Performance Modified RISC CPU

• Modified Harvard architecture

• C compiler optimized instruction set architecture

• 84 base instructions with flexible addressing modes

• 24-bit wide instructions, 16-bit wide data path

• 16 x 16-bit working register array

• Up to 30 MIPs operation :

• DC to 40 MHz external clock input

• 4 MHz – 10 MHz oscillator input with PLL active (4x, 8x, 16x)

• Peripheral and External interrupt sources

• 8 user selectable priority levels for each interrupt

• 4 processor exceptions and software traps

• Primary and Alternate interrupt Vector Tables

DSP Engine Features of dspic 30f4011

• Modulo and Bit – Reversed Addressing modes

• Two, 40 – bit wide accumulators with optional saturation logic

• 17 – bit x 17- bit single cycle hardware fractional/ integer multiplier

• Single cycle Multiply-Accumulate (MAC) operation

• 40 – stage Barrel Shifter

• Dual data fetch

Peripheral Features of dspic30f4011

• High current sink/source I/O pins : 25 mA/25 mA

• Optionally pair up 16-bit timers into 32 – bit timer modules

• 3-wire SPI™ modules (supports 4 Frame modes)

• I2C™ module supports Multi-Master/Slave mode and 7 – bit/10 – bit addressing

• Addressable UART modules with FIFO buffers

Motor Control PWM Module Features

• Complementary or Independent Output modes

• Edge and Center Aligned modes

• Multiple duty cycle generators

• Dedicated time base with 4 modes

• Programmable output polarity

• Dead time control for Complementary mode

• Manual output control

• Trigger for synchronized A/D conversions

Quadrature Encoder Interface Module Features

• Phase A, Phase B and Index Pulse input

• 16-bit up/down position counter

• Count direction status

• Position Measurement (x2 and x4) mode

• Programmable digital noise filters on inputs

• Alternate 16-bit Timer/Counter mode

• Interrupt on position counter rollover/underflow

Analog Features

• 10 – bit 1 Msps Analog-to-Digital Converter (A/D)

• A/D Conversion available during Sleep and Idle

• Sample/Hold Channels

• Multiple Conversion Sequencing Options

Special Microcontroller Features

• Enhanced Flash program memory 10,000 erase/write cycle (min.) for industrial temperature range, 100K (typical)

• Data EEPROM memory 100,000 erase/write cycle (min.) for industrial temperature range, 1M (typical)

• Self-reprogrammable under software control

• Power-on Reset (POR), Power-up Timer (PWRT) and Oscillator Start-up Timer (OST)

• Flexible Watchdog Timer (WDT) with on-chip low power RC oscillator for reliable operation

• Fail-Safe clock monitor operation

• Detects clock failure and switches to on-chip low power RC oscillator

• Programmable code protection

• In-Circuit Serial Programming™ (ICSP™)

• Programmable Brown-out Detection and Reset generation

• Selectable Power Management modes

• Sleep, Idle and Alternate Clock modes

The LM117 and LM317-N series of adjustable 3-pin positive voltage regulators are capable of supplying in excess of 1.5 A over a 1.25-V to 37-V output range and a wide temperature range. They are exceptionally easy to use and require only two external resistors to set the output voltage. Further, both line and load regulation are better than standard fixed regulators.

The LM117 and LM317-N offer full overload protection such as current limit, thermal overload protection and safe area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is disconnected.

Typically, no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors, in which case an input bypass is needed. An optional output capacitor can be added to improve transient response. The adjustment terminal can be bypassed to achieve very high ripple rejection ratios that are difficult to achieve with standard 3-terminal regulators.

Because the regulator is and detects only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input-to-output differential is not exceeded. That is, avoid short-circuiting the output.

By connecting a fixed resistor between the adjustment pin and output, the LM117 and LM317-N can be also used as a precision current regulator. Supplies with electronic shutdown can be achieved by clamping the adjustment terminal to ground, which programs the output to 1.25 V where most loads draw little current.

For applications requiring greater output current, see data sheets for LM150 series (3 A), SNVS772, and LM138 series (5 A), SNVS771. For the negative complement, see LM137 (SNVS778) series data sheet.