MSP430-PIR: Low Power Smart PIR Sensor

Application note SLAA283 from Texas Instruments was used to create MSP430-PIR, there are a few differences between the TI schematic and ours - our schematic support both the TI and the OLIMEX SBW JTAG layout; we ship the boards with SMT jumpers which are shortened for the OLIMEX JTAG layout so if you use the TI JTAG, you should move the jumpers to TI position.

MSP430-PIR board uses the ultralow-power microcontroller MSP430F2013 from Texas Instruments with these features:

• Low Supply Voltage Range 1.8 V to 3.6 V

• Ultralow-Power Consumption (Five Power-Saving Modes)

• Active Mode: 220 µA at 1 MHz, 2.2 V

• Standby Mode: 0.5 µA

• Off Mode (RAM Retention): 0.1 µA

• Ultrafast Wake-Up From Standby Mode in Less Than 1 µs

• 16-Bit RISC Architecture, 62.5 ns Instruction Cycle Time

• 16-Bit Timer_A With Two Capture/Compare Registers

• 16-Bit Sigma-Delta A/D Converter With Differential PGA Inputs and Internal Reference

• Universal Serial Interface (USI) Supporting SPI and I2C· Brownout Detector

• Serial Onboard Programming, No External Programming Voltage Needed

• Programmable Code Protection by Security Fuse

• On-Chip Emulation Logic With Spy-Bi-Wire Interface

• 2KB + 256B Flash Memory

• 128B RAM

Basic Clock Module Configurations:

• Internal Frequencies up to 16 MHz With Four Calibrated Frequencies to ±1%

• Internal Very Low Power LF Oscillator

• 32-kHz Crystal

• External Digital Clock Source