Holtek is pleased to announce its new SPI to USB Bridge Controller device, the HT45B0K. The device is designed to be used in conjunction with an external MCU to which it can connect seamlessly via its SPI interface. Its internal USB 2.0 Full Speed Mode interface enables connection to a PC thus providing customers with a simple method of conversion between these two popular interfaces.
The HT45B0K requires an external system oscillator of 6MHz or 12MHz. Its SPI interface provides a slave operation mode, with a maximum data transmission rate equal to the system clock divided by four. Other features include an operating voltage range selection of 3.3V or 5.0V and exceptionally low power consumption. It includes six USB Endpoints, including Endpoint 0, and a FIFO of 160 bytes with a fixed Endpoint FIFO size. Endpoints 3 and 5 offer a FIFO space of 64 bytes, and are able to support bulk transmission mode. As for packaging, the HT45B0K is supplied in a 16-pin NSOP package type, reducing the demands on PCB area.
Features
- Glueless slave SPI interface to Holtek's MCU
- USB (Universal Serial Bus) 1.1 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
- 6MHz/12MHz (CLKI) external clock input for USB PLL clock
- 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
The HT45B0K is presently available as customer samples for application development. Holtek can also provide customers with demo code and application notes to assist designers with rapid product development.
