公开(公告)号：US07459939B2

公开(公告)日：2008-12-02

申请号：US10569156

申请日：2004-09-09

申请人： William John Testin ,  David Gene Novak

发明人： William John Testin ,  David Gene Novak

IPC分类号： H03K19/175

CPC分类号： G06F13/4086 ,  G06F13/4077 ,  H03K19/0016

摘要： An active pull up configuration for data bus lines unaffected by integral pull up resistors within subsystems. The present application generally relates to digital systems comprising a plurality of power supply levels and data buses. More particularly, this invention relates to digital system comprising subsystems connected by common buses that require automatic charging of certain buses or lines. In a television signal processing apparatus using an I2C bus and using the present invention according to a exemplary embodiment of the present invention, a first device operative in a first mode of operation and a second device operative in said first mode of operation and a second mode of operation wherein said first circuit and said second circuit are both connected by the I2C bus wherein said each data bus line requiring an active pull up is connected to a first power supply via a first resistor integrated within the first device and connected to a second power supply via a second resistor integrated within said second device. The first resistor is electrically isolated from the first power supply during the second mode of operation and electrically connected to the first power supply during the second mode of operation.

摘要翻译： 数据总线的主动上拉配置，不受子系统内的整合上拉电阻的影响。 本申请通常涉及包括多个电源电平和数据总线的数字系统。 更具体地说，本发明涉及数字系统，其包括由需要对某些总线或线路进行自动充电的公共总线连接的子系统。 在根据本发明的示例性实施例的使用I2C总线并使用本发明的电视信号处理装置中，在第一操作模式下操作的第一装置和在所述第一操作模式下操作的第二装置和第二模式 其中所述第一电路和所述第二电路都通过I2C总线连接，其中所述每个需要主动上拉的数据总线线路经由集成在第一设备内的第一电阻器连接到第一电源，并连接到第二电源 通过集成在所述第二装置内的第二电阻供应。 第一电阻器在第二操作模式期间与第一电源电隔离，并且在第二操作模式期间电连接到第一电源。