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US 5,471,562 AGranted
Printer having a bit shift function
AssigneeMita Industrial Co., Ltd.
InventorsKouichi Shibata, Yusuke Morikawa, Ikuhiro Ohmi
Life of this patent
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Abstract
A source data latch circuit for latching data which are read-in from a DRAM is provided. A data latch circuit for latching one-byte data generated by a CPU and an overflowing bit storing circuit for storing overflowing data through a three-bit shift are provided. At a composing circuit, data latched by the latch circuit at a previous time and stored in the overflowing bit storing circuit and the present data latched by the latch circuit are composed. At an OR circuit, the composed data and data with respect to which an OR is obtained are written into RAM.
Claims8
A printer comprising:
- a shift means for processing image data on a per word basis, wherein said image data consist of a predetermined number of bits in an order;
- and
- a bit map memory for receiving image data from said shift means after a shift process by said shift means, said shift means including
- storing means for storing at least one bit of a bit string constituting a word, which at least one bit overflows into a succeeding word;
- and
- composing means for composing remaining bits of said word, and at least one overflowing bit from a word previously stored in said storing means, in order to output composed image data, said image data received by said bit map memory being based upon said composed image data.
3 more elements
Dependencies are inferred from the claim text.