General description
The ISP1130 integrates a Universal Serial Bus (USB) hub with a keyboard controller into a single chip, which complies with Universal Serial Bus Specification Rev. 1.1 and the USB Device Class Definition for Human Interface Devices (HID). The hub has 1 to 2 downstream ports and 1 to 3 non-removable embedded functions, one of which is dedicated to the keyboard operation. The hub controller is fully implemented in hardware, ensuring a fast response to host requests.

Features
■ Compound USB hub device with integrated hub repeater, hub controller, Serial Interface Engine (SIE), data transceivers and 5 V to 3.3 V voltage regulator
■ Complies with Universal Serial Bus Specification Rev. 1.1 and Device Class Definition for Human Interface Devices (HID)
■ Complies with ACPI, OnNow and USB power management requirements
■ Supports bus-powered and hybrid-powered application
■ 1 to 2 downstream ports with automatic speed detection
■ 1 to 3 non-removable embedded functions, 1 dedicated for keyboard operation
■ 8 × 18 scan line matrix for HID compliant keyboard applications
■ Integrated 80C51 microcontroller core with 8 kbytes mask ROM and 256 bytes data RAM
■ On-chip watchdog timer for automatic fault recovery
■ Internal power-on reset and low-voltage reset circuit
■ Individual power switching for downstream ports
■ Individual port overcurrent protection with built-in sense circuits
■ 6 MHz crystal oscillator with on-chip PLL for low EMI
■ Reduced power consumption by putting microcontroller in sleep mode or power-down mode
■ Visual USB traffic monitoring (GoodLink) for hub and downstream ports
■ I2C-bus interface to read vendor ID, product ID and configuration bits from external EEPROM
■ Operation over the extended USB bus voltage range (4.0 to 5.5 V)
■ Operating temperature range −40 to +85 °C
■ Available in 56-pin SDIP and SSOP packages.