Line memory controller for printer and method thereof

Details Line memory controller for printer and method thereof Line memory controller for printer and method thereof

1994-03-28

1996-01-02

Burr, Edgar S.

Typewriting machines

Typing by other than type-face or type-die

Thermal

395164, B41J 232, H04N 100

Patent

active

054802369

ABSTRACT:
A CPU executes an operation of writing image data of one line into a line memory group, and a read controller executes an operation of reading image data of one line from the line memory group. If an up-down counter outputs a write request signal, CPU fetches a 2-bit count of a write counter. In accordance with the count, CPU outputs a write line memory address for designating an address of a line memory, and writes image data of one line read from a frame memory into the designated line memory. Immediately after CPU starts writing the image data, a write start signal is supplied to the write counter and up-down counter to increment the count value thereof. The up-down counter generates a write request signal if the count is smaller than the number N of line memories. A read counter counts a one line print end signal to designate a line memory from which image data is read.

REFERENCES:
patent: 5146546 (1992-09-01), Neuhard et al.
patent: 5191430 (1993-03-01), Sudoh et al.

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