公开(公告)号：US20020099890A1

公开(公告)日：2002-07-25

申请号：US09989317

申请日：2001-11-20

Applicant: STMicroelectronics S.A.

Inventor： Xavier Mariaud ,  Daniel Klingelschmidt

IPC: G06F013/00

CPC classification number: G06F13/24 ,  G06F13/426

Abstract: A circuit is provided for reducing losses of the start of a new message caused by the microcontroller of a slave apparatus being unavailable. The circuit generates an interruption signal when the slave apparatus has received and acknowledged a start of a new message but the microcontroller is unavailable because it is processing a preceding message or an application of the slave apparatus.

Abstract translation: 提供了一种用于减少由不可用的从设备的微控制器引起的新消息的开始损失的电路。 当从设备已经接收并确认新消息的开始但是微控制器由于处理先前的消息或从设备的应用而不可用时，电路产生中断信号。

公开(公告)号：US20020062456A1

公开(公告)日：2002-05-23

申请号：US09990629

申请日：2001-11-16

Applicant: STMicroelectronics S.A.

Inventor： Xavier Mariaud ,  Daniel Klingelschmidt

IPC: G06F001/28

CPC classification number: G06F13/4068

Abstract: A self-powered peripheral apparatus is connected upstream to another apparatus via a universal serial bus (USB), wherein one of the conductors of the USB provides a supply voltage to the self-powered peripheral apparatus. One of the two data conductors of the USB is connected to a voltage source of the self-powered peripheral apparatus. The self-powered peripheral apparatus includes a control device for controlling the data conductor supply for supplying the latter only if the supply voltage is present on the supply conductor. The control device includes a circuit for detecting the supply voltage and a logic circuit for controlling the regulator.

Abstract translation: 自供电的外围设备经由通用串行总线（USB）上游连接到另一设备，其中USB的一个导体为自供电的外围设备提供电源电压。 USB的两条数据线之一连接到自供电的外围设备的电压源。 自供电的外围设备包括控制装置，用于仅当供应导体上存在电源电压时才控制数据导体供应供应电源。 控制装置包括用于检测电源电压的电路和用于控制调节器的逻辑电路。