Automatic A/D converter operation with pause capability
    1.
    发明授权
    Automatic A/D converter operation with pause capability 失效
    自动A / D转换器具有暂停功能

    公开(公告)号:US5302952A

    公开(公告)日:1994-04-12

    申请号:US936492

    申请日:1992-08-28

    IPC分类号: G06F3/05 H03M1/12

    CPC分类号: G06F3/05

    摘要: An analog-to-digital conversion module, QADC (1), and method minimize software involvement by providing a pause capacility. Each queue in the QADC (1) has one or more Conversion Command Words, CCWs (82), in a Conversion Command Word Table (62). Each conversion command word, CCW (82), has a Pause bit which can be used to create multiple sub-queues of A/D conversions without requiring the use of interrupts. The Pause bit can be used to place a queue in a pause state. When a queue enters a pause state, the scanning of CCWs (82) is stopped. The queue must then receive a trigger in order for the scanning of CCWs (82) to continue again.

    摘要翻译: 模数转换模块QADC(1)和方法通过提供暂停能力来最大限度地减少软件参与。 在转换命令字表(62)中,QADC(1)中的每个队列具有一个或多个转换命令字CCW(82)。 每个转换命令字CCW(82)都有一个暂停位,可以用于创建多个A / D转换子队列,而不需要使用中断。 暂停位可用于将队列置于暂停状态。 当队列进入暂停状态时,CCW(82)的扫描被停止。 队列必须接收一个触发器才能扫描CCW(82)再次继续。

    Automatic A/D converter operation using a programmable control table
    2.
    发明授权
    Automatic A/D converter operation using a programmable control table 失效
    自动A / D转换器使用可编程控制表进行操作

    公开(公告)号:US5168276A

    公开(公告)日:1992-12-01

    申请号:US852830

    申请日:1992-03-16

    IPC分类号: G06F3/05 H03M1/12

    CPC分类号: G06F3/05 H03M1/12

    摘要: An analog-to-digital conversion module and method minimize software involvement by providing a programmable control table comprising a plurality of conversion command words (CCW's). Each CCW designates conversion parameters such as channel and reference selection, input sample time, and re-sample inhibit for one conversion operation, upon conclusion of which a digital value is stored in a corresponding result table. A set of CCW's defines one or more conversion sequences. Upon conclusion of each sequence, an interrupt can be issued and the result table may be read by an associated device, such as a CPU. If desired, the CCW sequence may be dynamically altered during operation of the conversion system.

    摘要翻译: 模数转换模块和方法通过提供包括多个转换命令字(CCW's)的可编程控制表来最小化软件参与。 当结束数字值存储在相应的结果表中时,每个CCW指定转换参数,例如通道和参考选择,输入采样时间和重新采样禁止。 一组CCW定义了一个或多个转换序列。 在每个序列的结论之后,可以发出一个中断,并且结果表可以由诸如CPU的相关设备读取。 如果需要,可以在转换系统的操作期间动态地改变CCW序列。

    Automatic selection of external multiplexer channels by an A/D converter
integrated circuit
    4.
    发明授权
    Automatic selection of external multiplexer channels by an A/D converter integrated circuit 失效
    通过A / D转换器集成电路自动选择外部多路复用器通道

    公开(公告)号:US5166685A

    公开(公告)日:1992-11-24

    申请号:US850256

    申请日:1992-03-12

    IPC分类号: G06F3/05 H03M1/12

    CPC分类号: H03M1/12 G06F3/05

    摘要: An analog-to-digital conversion system module comprises a pin-limited A/D converter integrated circuit (I.C.) to which at least one multiplexer I.C. may be coupled and sampled.In one embodiment, host system software involvement is minimized by providing a sequence of sample commands, implemented by a channel sequencer or a programmable control table comprising a plurality of conversion command words (CCW's). A set of CCW's defines a conversion sequence which may be initiated and performed with minimal host system software involvement, upon conclusion of which a result table storing the converted digital values may be read by an associated device, such as a CPU.In one embodiment, some I/O pins of the A/D converter I.C. function either as analog inputs or address outputs to the external multiplexer, while other analog input pins alternatively function as single input channels or as combined channels from one or more external multiplexers. A software-loadable control register comprises a control field for a control word which determines the function of the programmable pins.

    摘要翻译: 一个模数转换系统模块包括一个引脚限制的A / D转换器集成电路(I.C.),至少一个多路复用器I.C。 可以被耦合和采样。 在一个实施例中,通过提供由信道定序器或包括多个转换命令字(CCW's)的可编程控制表实现的采样命令序列来最小化主机系统软件参与。 一组CCW定义了可以以最少的主机系统软件参与来启动和执行的转换序列,其结论是存储转换的数字值的结果表可以由诸如CPU的相关联的设备读取。 在一个实施例中,A / D转换器I.C的一些I / O引脚。 作为模拟输入或地址输出到外部多路复用器,而其他模拟输入引脚可以作为单个输入通道或来自一个或多个外部多路复用器的组合通道。 软件可加载控制寄存器包括用于确定可编程引脚功能的控制字的控制字段。