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    • 4. 发明授权
    • ASIC with selectable output drivers
    • 具有可选输出驱动器的ASIC
    • US5783963A
    • 1998-07-21
    • US608902
    • 1996-02-29
    • Sean Foster GarnettTerry Lee ParkerJohn Parker RicheyWarren John SpinaLarry Wayne True
    • Sean Foster GarnettTerry Lee ParkerJohn Parker RicheyWarren John SpinaLarry Wayne True
    • G06F3/00H03K19/0175H03H11/28H03K3/01
    • H03K19/017581
    • An ASIC (5) has four driver circuits (19a-19d), each with different output power. One of those driver circuits is selected from the content of register (13) on the ASIC. The register content being decoded by a decoder (15) on the ASIC to a signal which activates a single one of the drivers. The register is loaded from an external microprocessor during each initialization of a printer (1) in which the ASIC is a component. The ASIC is designed with the range of the powers of the drivers bracketing the estimated needs of the load to be attached to the ASIC. This permits the ASIC to be completed only once, while the most suitable driver for the final load is determined subsequently and selected by the entry of data to activate that driver into the register with each initialization of the printer. The ASIC need not have nonvolatile memory and only a single set of ASIC masks and other design aspects need be completed.
    • ASIC(5)具有四个驱动电路(19a-19d),每个具有不同的输出功率。 其中一个驱动电路是从ASIC上的寄存器(13)的内容中选出的。 寄存器内容由ASIC上的解码器(15)解码为激活单个驱动器的信号。 在打印机(1)的每个初始化期间,寄存器从外部微处理器加载,其中ASIC是组件。 ASIC的设计范围包括驱动器的功率范围,包括要连接到ASIC的负载的估计需求。 这允许ASIC仅完成一次,而用于最终负载的最合适的驱动器随后被确定并且通过数据的输入来选择,以便在打印机的每次初始化时将该驱动器激活到寄存器中。 ASIC不需要具有非易失性存储器,并且仅需要完成一组ASIC掩模和其他设计方面。