公开(公告)号：US09466385B1

公开(公告)日：2016-10-11

申请号：US13850813

申请日：2013-03-26

Applicant: GOOGLE INC.

Inventor： Mark D. Hayter ,  Frank R. Hislop ,  Olof Johansson

IPC: G11C16/04 ,  G11C16/22 ,  G11C16/10 ,  G11C7/24

CPC classification number: G11C16/22 ,  G11C7/24 ,  G11C16/10

Abstract: In a general aspect, a circuit can include a printed circuit board having an opening defined therein and an electrical write line disposed on the circuit board. The electrical write line can be connected to a semiconductor memory device, and be configured to transmit a write voltage signal to the semiconductor memory device to write data therein in a write mode of the circuit. The circuit can also include an input voltage terminal disposed on the circuit board. The input voltage terminal can be configured to receive a write-protection voltage. The circuit can also include a reversible closing element that, when inserted in the opening in the circuit board, electrically connects the electrical write line and the input voltage terminal to pass the write- protection voltage to the electrical write line connected to the semiconductor memory device to reversibly enable a write-protect mode of the circuit.

Abstract translation: 在一般方面，电路可以包括其中限定有开口的印刷电路板和设置在电路板上的电写线。 电写入线可以连接到半导体存储器件，并且被配置为将写入电压信号发送到半导体存储器件，以在电路的写入模式中写入数据。 电路还可以包括设置在电路板上的输入电压端子。 输入电压端子可以配置为接收写保护电压。 电路还可以包括可逆闭合元件，当可插入电路板的开口中时，电连接电写线和输入电压端子以将写保护电压传递到连接到半导体存储器件的电写线 以可逆地启用电路的写保护模式。