A semiconductor chip controls an A x B matrix of heaters in a thermal printhead in accordance with a digital code stored in a buffer register. A logic array gated to the register is programmed selectively to enable A control lines leading to columns of heaters. A counter sequentially enables B control lines leading to rows of heaters. Control logic is responsive to a function code to initiate a printing operation in which a counter operates in response to a condition in the control logic to immobilize the control logic and to initiate B successive burn/cool cycles each followed by incrementing the row counter. Responsive to a final condition in the row counter, the control logic is again rendered operable.
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机译:半导体芯片根据存储在缓冲寄存器中的数字代码控制热敏打印头中加热器的A x B矩阵。选通编程到门控寄存器的逻辑阵列,以启用通向加热器列的A条控制线。计数器依次启用B条控制线,这些控制线通向加热器行。控制逻辑对功能代码作出响应以启动打印操作,其中计数器响应于控制逻辑中的条件而工作,以固定控制逻辑并启动B个连续的燃烧/冷却循环,每个循环燃烧/冷却循环之后依次递增行计数器。响应于行计数器中的最终条件,控制逻辑再次变为可操作的。
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