NJU6635 New Japan Radio Co.,Ltd, NJU6635 Datasheet - Page 18

• Manufacturer Part Number: NJU6635
• Description: 16-character 2-line Dot Matrix Lcd Controller Driver
• Manufacturer: New Japan Radio Co.,Ltd

Note) The address counter (AC) is automatically incremented by 1 after write instructions to either of the CG
Read data to DD RAM
Read data to CG RAM
l) Read Data from CG or DD RAM
RAM or DD RAM. Even if the read instruction is executed after this instruction, the addressed data
can not be read out correctly.
For a correct data read out, either the address set instruction or cursor shift instruction (only with DD
RAM) must be implemented just before this instruction or from the second time read out instruction
execution if the read out instruction is executed 2 times consecutively.
and (R/W).
and the binary 8-bit data “DDDDDDDD” are read out from DD RAM. The selection of the CG
RAM or DD RAM is determined by the previous instruction.
be executed, otherwise the first read out data Invalidated.
read.
beforehand (only DD RAM reading).
the DD RAM, the address increment or decrement is executed automatically according to the entry
mode.
Code
Code
Read Data to CG RAM or DD RAM instruction is executed when the code ”1” is written into (RS)
By the execution of this instruction, the binary 5-bit data “DDDDD” are read out from CG RAM,
Before executing this instruction, either the CG RAM address set or DD RAM address set must
When this instruction is serially executed, the next address data is normally read from the second
The address set instruction is not required if the cursor shift instruction is executed just
The cursor shift instruction has same function as the DD RAM address set, so that after reading
But display shift does not occur regardless of the entry mode.
RS
RS
1
1
R/W
R/W
1
0
DB
DB
D
7
7
Higher order bit
Higher order bit
DB
DB
D
6
6
DB
DB
D
5
5
DB
DB
D
D
4
4
DB
DB
D
D
3
3
Lower order bit
Lower order bit
DB
DB
D
D
2
2
DB
DB
D
D
1
1
DB
DB
D
D
0
0
NJU6635
=Don’t Care