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    • 22. 发明申请
    • SEMICONDUCTOR INTEGRATED CIRCUIT
    • 半导体集成电路
    • US20080218224A1
    • 2008-09-11
    • US12120090
    • 2008-05-13
    • Naozumi MorinoTakahiro IritaYasuto Igarashi
    • Naozumi MorinoTakahiro IritaYasuto Igarashi
    • H03L7/00
    • H03K17/22
    • The present invention is directed to assure an initial state of a circuit until a power supply voltage is stabilized at the time of power-on and to prevent an output circuit of an external input/output buffer circuit from performing erroneous operation at the time of setting a predetermined register value or the like to an initial value. A power supply detecting circuit outputs a power supply voltage detection signal indicating that a power supply voltage supplied from the outside enters a predetermined state. A power on reset circuit receives the power supply voltage detection signal, instructs an initial setting operation of the internal circuit at a predetermined timing and, in response to completion of the initial setting operation of the internal circuit, changes an external input/output buffer circuit from a high impedance state to an operable state. Consequently, when the external input/output buffer circuit becomes operable, the initial setting of the internal circuit has already completed.
    • 本发明旨在确保电源的初始状态,直到上电时电源电压稳定并且防止外部输入/输出缓冲电路的输出电路在设置时执行错误操作 将预定的寄存器值等设置为初始值。 电源检测电路输出表示从外部供给的电源电压进入预定状态的电源电压检测信号。 上电复位电路接收电源电压检测信号,在预定定时指示内部电路的初始设定动作,并且响应于内部电路的初始设定动作的结束,改变外部输入输出缓冲电路 从高阻抗状态到可操作状态。 因此,当外部输入/输出缓冲电路变得可操作时,内部电路的初始设置已经完成。
    • 25. 发明授权
    • Semiconductor integrated circuit with power-on state stabilization
    • 具有开机状态稳定的半导体集成电路
    • US07378887B2
    • 2008-05-27
    • US11495735
    • 2006-07-31
    • Naozumi MorinoTakahiro IritaYasuto Igarashi
    • Naozumi MorinoTakahiro IritaYasuto Igarashi
    • H03L7/00
    • H03K17/22
    • The present invention is directed to assure an initial state of a circuit until a power supply voltage is stabilized at the time of power-on and to prevent an output circuit of an external input/output buffer circuit from performing erroneous operation at the time of setting a predetermined register value or the like to an initial value. A power supply detecting circuit outputs a power supply voltage detection signal indicating that a power supply voltage supplied from the outside enters a predetermined state. A power on reset circuit receives the power supply voltage detection signal, instructs an initial setting operation of the internal circuit at a predetermined timing and, in response to completion of the initial setting operation of the internal circuit, changes an external input/output buffer circuit from a high impedance state to an operable state. Consequently, when the external input/output buffer circuit becomes operable, the initial setting of the internal circuit has already completed.
    • 本发明旨在确保电源的初始状态,直到上电时电源电压稳定并且防止外部输入/输出缓冲电路的输出电路在设置时执行错误操作 将预定的寄存器值等设置为初始值。 电源检测电路输出表示从外部供给的电源电压进入预定状态的电源电压检测信号。 上电复位电路接收电源电压检测信号,在预定定时指示内部电路的初始设定动作,并且响应于内部电路的初始设定动作的结束,改变外部输入输出缓冲电路 从高阻抗状态到可操作状态。 因此,当外部输入/输出缓冲电路变得可操作时,内部电路的初始设置已经完成。
    • 27. 发明申请
    • Semiconductor integrated circuit
    • 半导体集成电路
    • US20070046342A1
    • 2007-03-01
    • US11495735
    • 2006-07-31
    • Naozumi MorinoTakahiro IritaYasuto Igarashi
    • Naozumi MorinoTakahiro IritaYasuto Igarashi
    • H03L7/00
    • H03K17/22
    • The present invention is directed to assure an initial state of a circuit until a power supply voltage is stabilized at the time of power-on and to prevent an output circuit of an external input/output buffer circuit from performing erroneous operation at the time of setting a predetermined register value or the like to an initial value. A power supply detecting circuit outputs a power supply voltage detection signal indicating that a power supply voltage supplied from the outside enters a predetermined state. A power on reset circuit receives the power supply voltage detection signal, instructs an initial setting operation of the internal circuit at a predetermined timing and, in response to completion of the initial setting operation of the internal circuit, changes an external input/output buffer circuit from a high impedance state to an operable state. Consequently, when the external input/output buffer circuit becomes operable, the initial setting of the internal circuit has already completed.
    • 本发明旨在确保电源的初始状态,直到上电时电源电压稳定并且防止外部输入/输出缓冲电路的输出电路在设置时执行错误操作 将预定的寄存器值等设置为初始值。 电源检测电路输出表示从外部供给的电源电压进入预定状态的电源电压检测信号。 上电复位电路接收电源电压检测信号,在预定定时指示内部电路的初始设定动作,并且响应于内部电路的初始设定动作的结束,改变外部输入输出缓冲电路 从高阻抗状态到可操作状态。 因此,当外部输入/输出缓冲电路变得可操作时,内部电路的初始设置已经完成。