Gas, Water and Heat Flow Meters

Microchip is driving new advances in microcontrollers used in gas/water/heat meters to extend battery life, improve measurement accuracy, and reduce system cost. Specialized peripherals lower the cost for ultrasonic flow measurement while new advances in nanoWatt XLP technology pushes the industry into lower and lower power consumption levels. Microchip offers a broad portfolio of low-power and high integration PIC^® MCUs using a common MPLAB^® development environment for easy migration across
MCU families.

eXtreme Low Power with XLP Technology

---

• Sleep currents down to 20 nA; Real-Time Clock down to 400 nA extends operation in outage conditions
• Wake-up sources including Real-Time Clock (RTC), Timer (WDT), Brown-out Reset (BOR), Interrupts, Reset,
  or Power-on Reset (POR)

Efficient Processing Architecture Lowers Active Current

---

• Reduce power consumption with shorter run times
• Over 88% of PIC24 instructions are single cycle
• As low as 150 uA/MHz run power on the 16-bit
  PIC24 MCU family
• DMA transfers across peripherals to reduce power

Click image to enlarge

Integrated Precision Time Measurement

---

• Constant current source to calculate both capacitance and time changes
• CTMU time measurement capabilities down to
  30pSec resolution
• Eliminates need for time measurement ASIC used in ultrasonic flow measurement
• Precision temperature measurements using inexpensive diodes, resistive temperature device (RTD), PTC, and NTC sensors

Click image to enlarge

Integrated Real-Time Clock and Calendar (RTCC)

---

• Integrated Real-Time-Clock and Calendar (RTCC)
• Full calendar and time with Leap Year adjustment
• Built-in RTCCAL register for Watch Crystal calibration

Click image to enlarge

LCD Integration

---

• Up to 480 Segments
• Drive display in Sleep Mode
• Integrated Charge Pump available for contrast control