| 摘要 |
PURPOSE:To shorten the processing time of CPU necessary for turning character to a large extent, by writing matrix like dot data of vertical n-dots and horizontal n-dots in a latch circuit from CPU and reading the same from an output buffer circuit n-times to turn the character by 90 deg.. CONSTITUTION:A decoder 1 can access up to 8 circuits by 3-bit address input and one-bit-CE input. A gate circuit 2 selects one of eight input latch circuit 4 on the basis of the data writing signal-WR from CPU. CPU writes row data 8 byte in eight 8-bit latch circuits 4 while altering address. The output terminals of eight latch circuits 4 are connected to the input terminals of eight try state output buffers 5 so as to take the arrangement obtained when the data latched by said latch circuits 4 are turned by 90 deg.. Further, one of the try state output buffers 5 is selected by a gate circuit 3 of the reading signal-RD from CPU and the output of the decoder 1 to output data.
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