ML9092-01TB datasheet(56/66 Pages) OKI

56 / 66 page

FEDL9092-01

OKI Semiconductor

ML9092-01/02/03/04

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X•Y address Counter Auto Increment

The liquid crystal display RAM has an X-address counter and a Y-address counter. Each address counter has an

Auto Increment function.

When display data is read or written, this function increments either of these X- and Y-address counters (which is

selected by the INC bit (D7 bit) of the control register 1).

INC bit = “0” selects the Y-address counter.

INC bit = “1” selects the X-address counter.

The address counting cycle of the X address counter varies according to the selected word length (8 bits or 6 bits):

X address range of 0 to 6 (ML9092-01) or 0 to7 (ML9092-02/03/04) in the 8-bits/word mode or X address range of

0 to 9 in the 6-bits/word mode.

When the X address count returns to 0 from a maximum value (6 (ML9092-01) or 7 (ML9092-02/03/04) in the

8-bits/word mode, or 9 in the 6-bits/word mode), the Y address is also incremented automatically.

The relationship between display duties and Y address count ranges is shown below.

When the Y-address counter returns to 0 from a maximum value, the X address is also incremented automatically.

Model

Duty

Y-address count range (cycle)

Maximum Y address count

1/8

0 to 7

1/9

0 to 8

ML9092-01/02/03/04

1/10

0 to 9

Note:

If an invalid address (outside the address count range) is given to the X- or Y- address counter,

its counting will not be assured.

Example of incrementing the X-address

Example of incrementing the Y-address

(8 bits per word and 1/10 duty)

X address

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