USB KVM Switch

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2-Port USB KVM Switch SoC

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KVM (short for Keyboard, Video, and Mouse) is a hardware and software technology solution that allows you to control multiple computers from one set of peripherals. Compared with the legacy 2-port USB KVM switch using 7 chips (including one MCU, two USB device MCUs, one USB root hub, two EEPROMs and one bus switches), the AX68002 is a highly integrated single chip and low-cost solution ideally suitable for cable/desktop KVM Switch and KVM extender applications. Compared with legacy chipset solution, the advantages of AX68002 single chip solution are: power management unit with deep sleep mode, manufacture driver for USB device in console being transparent to computers, same mouse sample rate on PC and device sides, integrating DDC (Display Data Channel) Emulation and EDID (Extended Display Identification Data), supporting four USB downstream ports in console, up to 7 USB devices in console (HID, Hub, MSC, Audio), and supporting touch screen, touch pad, and writing pad. The AX68002 features a single-cycle pipelined 8051/80390 core (up to 96MIPS), 128KB Flash memory, and 32KB RAM. The AX68002 integrates 2 multi-addressable Device Controllers (compliant with USB Spec 2.0 Full speed), one USB host controller and one USB root hub that supports two downstream ports and each compliant with USB2.0 Full/Low speed. The AX68002 supports peripheral communication interfaces such as I²C, one SPI bus, two UART (with one supporting 921.6Kbps), and 16 GPIOs. Single chip microcontroller with 2-Port USB KVM Switch CPU for Application 8-bit pipelined RISC, single cycle per instruction operating up to 96MHz and 100% software compatible with standard 8051/80390 Supports power management unit with deep sleep mode, programmable watchdog timer, three 16-bit timer/counters, and millisecond timer Supports CPU Debugger for connecting to In-Circuit Emulation (ICE) adaptor Supports DMA Controller (7 DMA channels) and memory arbiter for fast data movement during USB protocol stack processing and peripheral communications Program/Data and Flash Memory On-chip 8KB SRAM for CPU program code mirroring Supports In-System Programming (ISP) for initial Flash memory programming via UART or ICE adaptor Supports reprogrammable boot code and In-Application Programming (IAP) to update boot code or run-time firmware through USB or UART interface On-chip 32KB data memory for CPU and packet buffering On-chip 128KB Flash memory for CPU program code On-chip 1KB Flash Information Page for Hardware Configuration Supports Page architecture for flash erase Minimum 100,000 flash program/erase cycles Minimum 10 years flash data retention USB Interfaces Supports 2 multi-addressable Device Controllers and compliant with USB Spec 2.0 Full speed Build-in one USB host controller and one USB root hub that supports two downstream ports and each compliant with USB2.0 Full/Low speed Supports Control, Bulk, Interrupt, and Isochronous transfer types. Supports controllable D+ pull-up resistance for upstream ports Supports controllable D+/- pull-down resistance for downstream ports Supports Burst mode transfer for BULK data transfer in Device Controller Supports the downstream SOF synchronization with selected upstream port for ISO data transfer automatically Peripheral Communication Interfaces 2 UART interface (1 supporting DMA mode, Modem control, remote wake-up and up to 921.6Kbps baud) 1 High Speed SPI interface with DMA mode (1 master or 1 slave mode) 3 I²C interface with DMA mode (1 master with EDID Console and 2 slave mode with EDID Slave) Up to 2 GPIO ports of 8 bits each (Supports 2 GPIO ports with de-bounce and interrupt function) Programmable Buzzer function Supports KVM switch functions in software Controls 2 computers from a single console Supports USB keyboard/mouse Supports keyboard and mouse emulation for error-free booting USB device in console is transparent to computers that support most gaming/multimedia keyboards and multifunction mouse Mouse sample rate on both of downstream and upstream ports is the same Supports DDC (Display Data Channel) emulation and stores the console monitor’s EDID (Extended Display Identification Data) Two computers can share two USB downstream ports in console Supports maximum 7 USB devices in console, including HID, HUB, MSC and Audio Class Supports touch screen, writing pad, and touch pad devices Supports “push buttons” and “hot keys” switching Supports auto-scan mode for monitoring PC operation Integrates on-chip oscillator and 96MHz PLL to operate with external 12MHz crystal Integrates on-chip power-on reset circuit 64-pin QFN RoHS compliant package Operating temperature range: 0 to +70°C

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