NJU6475B 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJU6475B

12-Character 4-Line Dot Matrix Low Power LCD Controller Driver with key Scan Function

Japan Radio Corporation  

NJU6475B

(i) Set RAM Address

RS

Code 0

R/W

0

DB7 DB6 DB5 DB4

1 AAA

Higher order bit

DB3 DB2 DB1 DB0

AAAA

Lower order bit

The RAM address set instruction is executed when the code "1" is written into DB7 and the address is

written into DB6 to DB0 as shown above.

The address data (DB6 to DB0) is written into the address counter (AC) by this instruction.

After this instruction execution, the data writing/reading is performed into/from the addressed RAM.

The RAM includes DD RAM, CG RAM and MK RAM and these RAMs are shared by addressed as shown

below.

RAM Address

DD RAM

DD RAM

DD RAM

DD RAM

CG RAM

MK RAM

1st Line :

2nd Line :

3rd Line :

4th Line :

4 Characters :

128 Icons :

(00)H to (0B)H

(10)H to (1B)H

(20)H to (2B)H

(30)H to (3B)H

(40)H to (5F)H

(60)H to (7F)H

(j) Write Data to CG, DD or MK RAM

-Write Data to DD RAM

RS

Code 1

R/W

0

DB7 DB6 DB5 DB4

DDDD

Higher order bit

DB3 DB2 DB1 DB0

DDDD

Lower order bit

-Write Data to CG or MK RAM

RS

Code 1

R/W

0

DB7 DB6 DB5 DB4

*

*

*

D

Higher order bit

DB3 DB2 DB1 DB0

DDDD

Lower order bit

*= Don't Care

Write Data to RAM instruction is executed when the code "1" is written into (RS) and code "0" is written into

(R/W).

By the execution of this instruction, the data is written into RAM. The selection of RAM is determined by the

previous instruction.

After this instruction execution, the address increment (+1) or decrement (-1) is performed automatically

according to the entry mode set.

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