The **uPD720100AGM-8EY-A** is a specialized integrated circuit (IC) developed by Renesas Electronics (formerly NEC). It is primarily designed as a high-performance **USB 2.0 Host Controller**. Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. General Specifications | Feature | Details | | :--- | :--- | | **Function** | USB 2.0 Open Host Controller Interface (OHCI) / Enhanced Host Controller Interface (EHCI) | | **Number of Ports** | 5 Downstream ports | | **Interface Type** | 32-bit PCI Interface (Revision 2.2 compliant) | | **Data Rates** | High-speed (480 Mbps), Full-speed (12 Mbps), Low-speed (1.5 Mbps) | | **Package Type** | 160-pin Plastic LQFP (Low Profile Quad Flat Package) | ### 2. Core Functional Components The architecture of this chip is divided into three main operational blocks: * **PCI Interface Block:** Handles communication between the host computer's CPU/Memory and the USB controller via the PCI bus. It supports 33MHz clock frequencies. * **Host Controller Block:** * **EHCI:** Manages High-Speed (USB 2.0) traffic. * **OHCI:** Manages Full-Speed and Low-Speed (USB 1.1) traffic for legacy compatibility. * **Physical Layer (PHY):** Integrated transceivers that convert digital signals into the differential electrical signals used by USB cables. ### 3. Electrical Characteristics Reliable operation requires strict adherence to these power parameters: | Parameter | Symbol | Typical Value | | :--- | :--- | :--- | | **Core Supply Voltage** | $V_{DD}$ | 2.5 V | | **I/O Buffer Voltage** | $V_{DDIO}$ | 3.3 V | | **Operating Temperature** | $T_a$ | -40°C to +85°C (Industrial Grade) | | **Clock Input** | $CLK$ | 30 MHz (Crystal or Oscillator) | ### 4. Typical Applications Because this chip converts PCI signals to USB ports, it is commonly found in: 1. **PCI-to-USB Expansion Cards:** Adding USB ports to desktop PCs. 2. **Embedded Systems:** Industrial motherboards requiring additional peripheral connectivity. 3. **Set-top Boxes:** For connecting external storage or Wi-Fi dongles. --- ### 5. Pin Configuration Summary The 160-pin layout is categorized into several signal groups: * **AD[31:0]:** Multiplexed Address/Data bus for PCI. * **DP[4:0] / DM[4:0]:** Differential data pairs for the 5 USB ports. * **C/BE[3:0]:** PCI Bus Command and Byte Enables. * **PERR# / SERR#:** Error reporting signals for the PCI bus.