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MAXREFDES9002: C-source Reference for Operating the DS28E18 from Cortex-M4 GPIO Pins

MAXREFDES9002

リファレンスデザインの免責事項 参照:  重要なお知らせと免責事項  (リファレンスデザインおよびその他マキシムのリソース)

説明

The DS28E18 is an easy-to-use bridge integrated circuit (IC) that operates as a 1-Wire® slave device to a host controller. The IC provides a 512-byte command sequencer loaded with commands and control data to operate an I2C or SPI device interfaced to the DS28E18. Once loaded, the host controller sends a 1-Wire command to autonomously execute the sequence, power, and collect data from the attached peripherals. A subsequent 1-Wire command reads the collected data. The power for the attached sensors or peripherals is sourced from the 1-Wire line, enabling a very efficient solution to remotely power and control complex devices such as environmental sensors, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and display controllers. The MAXREFDES9002 is a reference design showcasing the DS28E18 that demonstrates how to implement a simple 1-Wire master using only a microcontroller’s GPIO pins. To demonstrate this, this reference design provides a GPIO-based 1-Wire library designed for an ARM® Cortex® M4 microcontroller, such as the MAX32660, with example programs for interfacing an I2C or SPI device connected to a DS28E18.

特長

  • Power and communication to I2C and SPI sensors through two wires
  • 512-byte command sequencer for autonomous operation
  • Up to 10mA at 3.3V sensor power derived from 1-Wire
  • Up to 100m distance with the 1-Wire interface
  • Example C-code demonstrates how to interface to I2C and SPI sensors

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Designed, Built, Tested

このボードは完全実装および試験済みです。販売はしておりません。

 

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PCBレイアウト

部品表(BOM)

マキシムデバイス (2)

型番 名称 製品ファミリ 注文 設計キットおよび評価モジュール
DS28E18 1-Wire®-I2C/SPIブリッジ、コマンドシーケンサ内蔵 セキュア認証 今すぐ購入
MAX32660 小型、超低電力、FPU内蔵Arm Cortex-M4プロセッサベースのマイクロコントローラ(MCU)、256KBのフラッシュおよび96KBのSRAM内蔵 #MakeWithMaxim 今すぐ購入

マキシムデバイス (2)

型番 製品ファミリ
セキュア認証
1-Wire®-I2C/SPIブリッジ、コマンドシーケンサ内蔵
#MakeWithMaxim
小型、超低電力、FPU内蔵Arm Cortex-M4プロセッサベースのマイクロコントローラ(MCU)、256KBのフラッシュおよび96KBのSRAM内蔵

設計ファイル (3)

タイトル 種類 サイズ 日付
MAXREFDES9002 BOM XLSX 13KB 2021-11-21
MAXREFDES9002 PCB PDF 578KB 2021-11-21
MAXREFDES9002 Schematic PDF 353KB 2021-11-21
日付 種類
2021-11-21

MAXREFDES9002 BOM

(XLSX, 13KB)

2021-11-21

MAXREFDES9002 PCB

(PDF, 578KB)

2021-11-21

MAXREFDES9002 Schematic

(PDF, 353KB)

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