Elan Digital USBHC869 MCU总线USB主控制方案
Elan Digital公司的USBHC869是全速USB主控制器,可使微处理器和微控制器增加USB主控制功能,USB2.0全速主控制,3.3V工作,I/O电压3.3V,2.8V或1.8V,单独的16KBTx和Rx FUFO,功耗只有40mW,主要用在手机,智能手机,UMPC,主板和MID等.本文介绍了USBHC869主要特性,多中和MCU连接图以及评估板电路图.
USBHC869: Microprocessor bus USB Host Controller
The USBHC869 is a Full Speed USB Host Controller designed to add USB Host capability to Microprocessors and Microcontrollers. The device measures just 4 x 4 mm is size thus consuming very little board space.
The asynchronous parallel bus is compatible with common microprocessor bus architectures or can be attached to the port pins of a microcontroller. For maximum flexibility, the interface can be used in 8 bit or 16 bit mode and at any I/O voltage level of between 1.8 and 3.3V.
The USBHC869 has an integrated crystal oscillator and a Phase Lock Loop module allowing a number of clocking options.
A very low power shutdown mode is available to conserve power in battery powered applications. An attached USB device can still signal a Resume wakeup signal to the host processor when the USBHC869 is in shutdown.
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