HT45B0K -- SPI to USB Bridge

General Description

This device is a companion chip for microcontrollers to provide USB connectivity with the USB
host. Six USB endpoints are supported with 8/8/8/64/8/64-byte FIFO for endpoint 0~5 respectively.
An external interrupt output to the host MCU is used for interrupt-driven operation.

However, the host MCU may also poll the status register to obtain the latest status if the interrupt is
not used.

The possible applications include low-cost data links for computers/peripherals, portable and
battery operated devices/instruments, factory automation and process control.

Features

  • Glueless slave SPI interface to Holtek's MCU
  • USB (Universal Serial Bus) 2.0 Full-speed module
    -  6 endpoints (endpoint 0 included)
    -  FIFO: 8, 8, 8, 64, 8, 64 for EP0~EP5 respectively
  • Operating voltage: VDD = 3.3V~5.5V
  • Suspend Mode with low suspend current
  • Remote Wake-up function
  • USB Multiple Interrupt Generation Sources:
    -  Access of the corresponding USB FIFO
        from the USB host
    -  USB suspend signal from the USB host
    -  USB resume signal from the USB host
    -  USB Reset signal from the USB host
  • CMOS external clock input, CLKI, with frequency 6MHz/12MHz for the USB PLL clock
  • 16-pin NSOP package

Technical Document

Other Information