Microchip Technology MCP9800DM-DL2

Overview

MCP9800DM-DL2 from Microchip Technology Inc. is a fully assembled temperature data logging demonstration board built around the MCP9800 high-accuracy I²C temperature sensor, PIC10F202 microcontroller, and 24LC16B EEPROM. It performs autonomous temperature sampling at ~1 Hz, stores up to 2,048 readings in nonvolatile memory, and supports readout via SEEVAL® 32 evaluation tool for Excel-based graphing. Designed for educational I²C protocol training and rapid environmental monitoring prototyping.

For engineers reviewing the MCP9800DM-DL2 datasheet, MCP9800DM-DL2 pinout, MCP9800DM-DL2 application, or MCP9800DM-DL2 equivalent, this page delivers verified hardware configuration, functional block relationships, firmware behavior (e.g., TIMEOUTVAL-driven sampling interval), BOM-level component roles, and direct integration guidance with SEEVAL® 32 and PICkit™ 2 tools - all specific to the shipped demo board assembly.

Technical Context

The MCP9800DM-DL2 implements a self-contained, battery-powered data logger where the PIC10F202 executes firmware that initiates I²C reads from the MCP9800A0T-M/OTG sensor, validates responses using START/STOP/ACK/NACK subroutines, and writes raw 12-bit temperature values to the 24LC16B EEPROM using page-write mode. The MCP101T-450I/TT supervisory IC ensures stable reset during CR2032 battery power-up and brown-out conditions.

Hardware interfaces include an 8-pin inverted I²C header compatible with SEEVAL® 32's ZIF socket, standard ICSP™ pins for reprogramming the PIC10F202, and a status LED (LTST-C170CKT) driven by the microcontroller to indicate active logging. Firmware is preloaded and configurable via TIMEOUTVAL (1–255) to adjust sampling interval from ~1 sec to several minutes.

Key Specifications

Availability

MCP9800DM-DL2 is available at Aetrix Electronics and suitable for educational labs, embedded sensor prototyping, environmental monitoring validation, and I²C protocol training requiring stable component supply and documented reference firmware.

Supply support for MCP9800DM-DL2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and development tools, certified to ISO/TS-16949:2002 and ISO 9001:2000.

The MCP9800DM-DL2 belongs to Microchip's demonstration board product line, designed explicitly to teach I²C communication fundamentals and provide a ready-to-use thermal data acquisition reference for students and engineers.

FAQ

What is the MCP9800DM-DL2 used for?

The MCP9800DM-DL2 is a complete, pre-assembled temperature data logger demonstration board. It autonomously measures ambient temperature using the MCP9800 sensor, stores readings in EEPROM, and enables export to Excel for visualization. Its primary use is teaching I²C protocol implementation and validating low-power thermal monitoring concepts without custom PCB design.

Does the MCP9800DM-DL2 require external programming to operate?

No - the MCP9800DM-DL2 ships with factory-loaded firmware on the PIC10F202 microcontroller. Once powered (via CR2032 battery and JP1 jumper), the status LED flashes to confirm active logging. Reprogramming is optional and only needed if users modify the TIMEOUTVAL sampling interval or alter I²C communication logic using PICkit™ 2 and the provided SEEVALDM-DL.hex file.

How is temperature data retrieved from the MCP9800DM-DL2?

Data is retrieved by inserting the MCP9800DM-DL2 into the SEEVAL® 32 evaluation tool's ZIF socket (8-pin header, inverted orientation), selecting "24AA16/24LC16B" under I²C protocol, and executing "Read > Entire Device". The resulting hex dump is exported as a .hex file and imported into the included Temperature Graph.xls spreadsheet for automatic °C/°F plotting.

What components are integrated on the MCP9800DM-DL2 board?

The MCP9800DM-DL2 integrates four key ICs: PIC10F202T-E/OT (controller), MCP9800A0T-M/OTG (temperature sensor), 24LC16BT-I/OT (data storage), and MCP101T-450I/TT (voltage supervisor). Supporting passives include 0603 capacitors, 10 kΩ/243 Ω resistors, LTST-C170CKT LED, MA2YD2600L Schottky diode, and CR2032 battery holder.

Can the sampling interval of the MCP9800DM-DL2 be changed?

Yes - the sampling interval is controlled by the TIMEOUTVAL constant in the PIC10F202 firmware. Default value is 1, yielding ~1 sample/sec. Values from 1 to 255 scale the delay approximately linearly (e.g., TIMEOUTVAL = 60 yields ~60 sec intervals). Modifying this requires reprogramming the PIC10F202 using PICkit™ 2 and the provided ASM/HEX source files.