NJU6631ACH 데이터 시트보기 (PDF) - Japan Radio Corporation
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NJU6631ACH Datasheet PDF : 32 Pages
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NJU6631A
(3-2) Initialization using the internal reset circuits
(a) 16-character 1-line in 8-bit operation Addressing Mode 1 (Using internal reset circuits).
At the 16-character 1-line display, the Function set, Display On/Off Control and Entry Set Instruction must be
executed before the data input, as shown below.
Since the display shift operation changes only display position and the DD RAM contents remain unchanged,
display data which are entered first can be output when the return home operation is performed.
Power On
Initialized.
No display appears.
↓
Function Set
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Set the
Character
8-bit operation,
1-line display,
16-
Pin
configuration mode A, Addressing
0 0 0 0 1 1 0 * 0 0 Mode 1.
↓
Disp. On/Off Control
Turns on display and cursor.
Entire display is in space
0 0 0 0 0 0 1 1 1 0 mode by the initialization.
↓
Entry Mode Set
↓
Example for set address
increment and cursor right
0 0 0 0 0 0 0 1 1 0 shift when the data write to
the DD or CG RAM.
Write data to the DD/CG RAM and set
the Instruction
(b) 8-character 2-line in 4-bit operation Addressing Mode 2 (Using internal reset circuits).
In the 4-bit operation, the function set must be performed by the user programming.
When the power is turned on, 8-bit operation is selected automatically, therefore the first input is performed
under 8-bit operation. In this operation, full instruction can not input because of terminals DB0 to DB3 are no
connection. Therefore, same instruction must be rewritten on the RS, R/W and DB7 to DB4, as shown below.
Since one operation is completed by the two accesses in the 4-bit operation mode, rewrite is required to set
the instruction code in full. 8-character 2-line in 4-bit operation is shown as follows:
Power On
↓
Function Set
↓
Function Set
↓
Disp. On/Off Control
↓
Initialized.
No display appears.
RS R/W DB7 DB6 DB5 DB4 Set the 4-bit operation.
0 0 0 0 1 0 This step is executed in 8-bit mode set by the initialization.
Set the 4-bit operation / 2-line 8-Character
0 0 0 0 1 0 display / Pin configuration mode B / Addressing
0 0 1 * 1 1 Mode 2. The 4-bitoperation starts from this step.
0
0
0
0
0
1
0
1
0
1
0
0
Turn on display and cursor.
Entire display is in space mode by the
initialization.
Entry Mode Set
↓
0
0
0
0
0
0
0
1
0
1
0
0
Example for set address increment and cursor
right shift when the data write to the DD or CG
RAM.
Write data to the DD/CG RAM and set
the Instruction
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