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1-Wire Dual-Port Link

2接点ソリューションを維持しながら先進的TWS機能を実現

製品の詳細

The DS2488 is a simple bridge device that with a single dedicated contact on each side of the bridge enables up to 512kbps pass-through communication, power delivery for battery charging, small message exchange, and state reporting between two microcontroller-based subsystems. An example application is true wireless stereo (TWS) earbuds containing a Bluetooth® Audio SoC and the microcontroller operated case that holds and charges the earbuds. In this scenario, the DS2488 would reside in earbuds alongside the SoC, and the charge case microcontroller would communicate with the DS2488 from a single dedicated pin (see the Typical Application Circuit). All of this is enabled with the flexibility of Maxim's 1-Wire interface, which is used to operate each of the two independent I/O ports, IOA and IOB. To enable device operation between two connected controllers, each of these two DS2488 1-Wire interfaces has access to a 64-bit factory-programmed ROM ID, an 8-byte buffer to transmit small messages, and registers for device configuration, status, and control of three open-drain GPIO pins. Through a configuration setting a bidirectional, high-speed 512kbps pass-through mode is enabled, which enables large data transfers between the two connected microcontrollers.

For communication between IOA and IOB, the DS2488 has a maximum operating voltage of 3.63V. But to support a special mode of power delivery from the subsystem connected to the IOA side to the subsystem connected to the IOB side, the device is 5V tolerant and goes into the power delivery state when 4V to 5V (nom) is applied to IOA. In this mode, an additional DS2488 output pin is used to control an external transistor for power delivery to IOB-side electronics, such as a battery charger.

主な機能

  • Two-Contact Solution Enables Advance TWS Features
    • Small Message Exchange between a Case and Earbuds
    • High-Speed 512kbps Pass-Through Mode to Transfer Files
    • Earbud Battery Charger Power Delivery
    • Three GPIO Pins for Optional Feature Control or State Detection
  • Full Range of Capabilities for Earbud and Charging Case Detection
    • Earbud 64-Bit Identification Number (ROM ID) Readable upon Insertion
    • Operating Power Parasitically Derived from the 1-Wire IOA Line
    • Detect when in or out of a Charging Case
    • Detect a Dead Charging Case Battery
  • Minimalist Dual 1-Wire Interface Reduces Cost and Complexity
    • Single Dedicated Contact for Communication and Power
    • Arbitrated Communication between Two Host Controllers at 90kbps
    • Reads and Writes over a Wide 1.71V to 3.63V Voltage Range
  • Ideal for Battery Power Consumer Applications
    • Small, 1.6mm x 0.9mm x 0.33mm WLP with 0.4mm Ball Pitch
    • 1.71V to 3.63V Operating Voltage Range
    • High ESD Immunity of IOA Pin: ±8kV HBM (typ)
    • -40°C to +85°C Operation

アプリケーション/用途

  • 通信および制御ブリッジ
  • 電子錠
  • 完全ワイヤレスステレオイヤホンおよび充電ボックス
  • ウェアラブルデバイス
Parametric specs for 1-Wire Interface Products
Functions 1-Wire Bridge
Command Sequencer
VSUPPLY (V) 1.71V to 3.63V
Package/Pins ULTRA THIN WLP/8
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
$0.42 @1k
全て表示する

簡略化されたブロック図

DS2488:詳細ブロックダイアグラム DS2488:詳細ブロックダイアグラム Zoom icon

技術資料

データシート 1-Wire Dual-Port Link Oct 08, 2020

設計と開発

以下タイトルをクリックして詳細をご覧ください。

説明

The DS2488 evaluation kit (EV kit) provides the hard- ware and software necessary to exercise the features of the DS2488. The EV system consists of two boards: the DS9401 and DS2488 EV kit boards. The DS2488 board contains two DS2488 parts. The evaluation software runs on Windows® 10, 8, and 7 operating systems. It provides a handy user interface to exercise the features of the DS2488.

詳細を見る

特長

  • Demonstrates the Features of the DS2488
  • Fully Compliant with USB Specification v2.0
  • Software Runs on Windows 10, 8, and 7
  • Convenient On-Board Test Points

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サポートとトレーニング

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パラメーター

Parametric specs for 1-Wire Interface Products
Functions 1-Wire Bridge
Command Sequencer
VSUPPLY (V) 1.71V to 3.63V
Package/Pins ULTRA THIN WLP/8
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
$0.42 @1k

主な機能

  • Two-Contact Solution Enables Advance TWS Features
    • Small Message Exchange between a Case and Earbuds
    • High-Speed 512kbps Pass-Through Mode to Transfer Files
    • Earbud Battery Charger Power Delivery
    • Three GPIO Pins for Optional Feature Control or State Detection
  • Full Range of Capabilities for Earbud and Charging Case Detection
    • Earbud 64-Bit Identification Number (ROM ID) Readable upon Insertion
    • Operating Power Parasitically Derived from the 1-Wire IOA Line
    • Detect when in or out of a Charging Case
    • Detect a Dead Charging Case Battery
  • Minimalist Dual 1-Wire Interface Reduces Cost and Complexity
    • Single Dedicated Contact for Communication and Power
    • Arbitrated Communication between Two Host Controllers at 90kbps
    • Reads and Writes over a Wide 1.71V to 3.63V Voltage Range
  • Ideal for Battery Power Consumer Applications
    • Small, 1.6mm x 0.9mm x 0.33mm WLP with 0.4mm Ball Pitch
    • 1.71V to 3.63V Operating Voltage Range
    • High ESD Immunity of IOA Pin: ±8kV HBM (typ)
    • -40°C to +85°C Operation

アプリケーション/用途

  • 通信および制御ブリッジ
  • 電子錠
  • 完全ワイヤレスステレオイヤホンおよび充電ボックス
  • ウェアラブルデバイス

説明

The DS2488 is a simple bridge device that with a single dedicated contact on each side of the bridge enables up to 512kbps pass-through communication, power delivery for battery charging, small message exchange, and state reporting between two microcontroller-based subsystems. An example application is true wireless stereo (TWS) earbuds containing a Bluetooth® Audio SoC and the microcontroller operated case that holds and charges the earbuds. In this scenario, the DS2488 would reside in earbuds alongside the SoC, and the charge case microcontroller would communicate with the DS2488 from a single dedicated pin (see the Typical Application Circuit). All of this is enabled with the flexibility of Maxim's 1-Wire interface, which is used to operate each of the two independent I/O ports, IOA and IOB. To enable device operation between two connected controllers, each of these two DS2488 1-Wire interfaces has access to a 64-bit factory-programmed ROM ID, an 8-byte buffer to transmit small messages, and registers for device configuration, status, and control of three open-drain GPIO pins. Through a configuration setting a bidirectional, high-speed 512kbps pass-through mode is enabled, which enables large data transfers between the two connected microcontrollers.

For communication between IOA and IOB, the DS2488 has a maximum operating voltage of 3.63V. But to support a special mode of power delivery from the subsystem connected to the IOA side to the subsystem connected to the IOB side, the device is 5V tolerant and goes into the power delivery state when 4V to 5V (nom) is applied to IOA. In this mode, an additional DS2488 output pin is used to control an external transistor for power delivery to IOB-side electronics, such as a battery charger.

簡略化されたブロック図

DS2488:詳細ブロックダイアグラム DS2488:詳細ブロックダイアグラム Zoom icon

技術資料

データシート 1-Wire Dual-Port Link Oct 08, 2020

サポートとトレーニング

ナレッジベースを検索して技術質問への回答を探す。

絞り込まれた検索

マキシムでは、お客様の技術的質問にお答えするため、アプリケーションエンジニアの専任チームも配置しています。 サポートセンター をご覧ください。