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TIDA-00848

Reference Design for Segment LCD Control Using GPIO Pins to Increase System Flexibility

Design files

TIDA-00848

Design files

Overview

The TIDA-00848 reference design provides an innovative solution for adding LCD functionality to any Smart Grid or IoT application, where seven-segment LCD operation is required but the LCD dsiplay does not have to be always on. Using a few resistors and optimized GPIO control software on a CC1310 SimpleLinkTM Wireless MCU, a seven-segment LCD support is implemented. This design approach can be used with any TI microcontrollers without an on-chip LCD controller module.

Features
  • Innovative solution for driving Seven-segment LCD thru GPIOs by CC1310 SimpleLink Wireless MCU
  • Only 26 I/Os needed for driving 80 seg-ments of a 4-MUX, 1/3-biased LCD
  • Sensor controller peripheral senses the capacitive touch PCB area and reads out the LMT70A sensors periodically
  • 2-layer PCB With HCA form factor using a 96-segment 4-MUX LCD and cap touch area for LCD ON/OFF
  • Average current: 835 nA @ 3.6 V (LCD OFF); 338 uA @ 3.6 V (80 LCD segments ON) under TI RTOS framework
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

download Design guide — TIDA-00848
TIDUBQ7A.PDF (2436 K)

Reference design overview and verified performance test data

download Schematic — TIDA-00848
TIDRM27.PDF (487 K)

Detailed schematic diagram for design layout and components

download Bill of materials (BOM) — TIDA-00848
TIDRM28.PDF (161 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

download Assembly drawing — TIDA-00848
TIDRM29.PDF (212 K)

Detailed overview of design layout for component placement

download CAD/CAE symbol — TIDA-00848
TIDRM31.ZIP (904 K)

Files used for 3D models or 2D drawings of IC components

download Gerber file — TIDA-00848
TIDCC90.ZIP (688 K)

Design file that contains information on physical board layer of design PCB

download PCB layout — TIDA-00848
TIDRM30.PDF (1341 K)

PCB layer plot file used for generating PCB design layout

download PCB layout — TIDA-00848
TIDRM32.PDF (939 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

Analog temperature sensors

LMT70A — ±0.1°C Matching Accuracy Precision Analog Temperature Sensor

Data sheet: PDF | HTML
Sub-1 GHz wireless MCUs

CC1310 — SimpleLink™ 32-bit Arm Cortex-M3 Sub-1 GHz wireless MCU with 128kB Flash

Data sheet: PDF | HTML

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Software

Technical documentation

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Type Title Date
* Design guide Segment LCD Control Using GPIO Pins To Increase System Flexibility Design Guide (Rev. A) Jun. 16, 2016

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