General description
The ISP1181B is a Universal Serial Bus (USB) peripheral controller that complies with Universal Serial Bus Specification Rev. 2.0, supporting data transfer at full-speed (12 Mbit/s). It provides full-speed USB communication capacity to microcontroller or microprocessor-based systems. The ISP1181B communicates with the system’s microcontroller or microprocessor through a high-speed general-purpose parallel interface.

Features
■ Complies with Universal Serial Bus Specification Rev. 2.0 and most Device Class specifications
■ Supports data transfer at full-speed (12 Mbit/s)
■ High performance USB peripheral controller with integrated Serial Interface
Engine (SIE), FIFO memory, transceiver and 3.3 V voltage regulator
■ High speed (11.1 Mbyte/s or 90 ns read/write cycle) parallel interface
■ Fully autonomous and multi-configuration DMA operation
■ Up to 14 programmable USB endpoints with 2 fixed control IN/OUT endpoints
■ Integrated physical 2462 bytes of multi-configuration FIFO memory
■ Endpoints with double buffering to increase throughput and ease real-time data transfer
■ Seamless interface with most microcontrollers/microprocessors
■ Bus-powered capability with low power consumption and low ‘suspend’ current
■ 6 MHz crystal oscillator input with integrated PLL for low EMI
■ Controllable LazyClock (100 kHz ± 50 %) output during ‘suspend’
■ Software controlled connection to the USB bus (SoftConnect™)
■ Good USB connection indicator that blinks with traffic (GoodLink™)
■ Clock output with programmable frequency (up to 48 MHz)
■ Complies with the ACPI™, OnNow™ and USB power management requirements
■ Internal power-on and low-voltage reset circuit, with possibility of a software reset
■ Operation over the extended USB bus voltage range (4.0 V to 5.5 V) with 5 V tolerant I/O pads
■ Operating temperature range −40 °C to +85 °C
■ Full-scan design with high fault coverage
■ Available in TSSOP48 and HVQFN48 packages.

Applications
■ Personal Digital Assistant (PDA)
■ Digital camera
■ Communication device, for example:
◆ Router
◆ Modem
■ Mass storage device, for example:
◆ Zip drive
■ Printer
■ Scanner.