TIDA-00007 Reference Design

Texas Instruments

I2C Based Human Interface Device (HID) Protocol Keyboard Implementation for Windows 8

Description

This reference design is a verified Keyboard Scanner or controller. This 128 key scan device is specifically targeted towards end equipment that runs on Windows 8 operating system. The device is fully compliant with the HID over I2C specification (ver 1.0) defined by Microsoft.

Features
  • Supports I2C Fast Mode+ speed up to 1MHz Can support up to 128 (8x16) key scanOpen-Drain active low INT outputOpen drain outputs can sink up to 12mA current for LEDSoftware Reset per HID over I2C standardInternal pull-up resistors make implementation easy with no need for external components
Applications
  • Telehealth Systems
Product Categories
  • Interface

Parts

Part Number Name Companion Part
TCA8424 TCA8424 Buy Datasheet

Bill Of Materials

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Schematic

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Design File

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Test Data

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Other Documents

Title Updated Type Size (KB)
TIDA-00007 PCB 21 Aug 2013 PDF 66
TIDA-00007 BOM 21 Aug 2013 PDF 108
TIDA-00007 Schematic 21 Aug 2013 PDF 81