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3.4 Instructions
3.4.1
General
Instructions are listed on Table 2. Instructions other than the Status Read instruction will not be
executed if they are sent while another instruction is already being executed. The busy flag is "1"
when executing the instruction.
instructions from the MPU.
Instruction
R/W
D / I
Display
1
0
0
ON / OFF
Display start
2
0
0
line
X-address
(page) set
3
0
0
Y-address
4
0
0
set
Status read
5
1
0
Display data
6
0
1
write
Display data
7
1
1
read
Note: The BUSY time varies depending upon the frequency Fφ (:215 kHz (typ.) ) of φ1 , φ2 (1/Fφ ≤ T
3.4.2
Detailed explanation
(1) Display ON/OFF
Code
Turns the display ON when D=1, and OFF when D=0.
original display appears if D is set to 1 because the display data is retained in the display data RAM.
Check whether or not the flag is "1" before transmitting the
Table 2 List of Instructions
Code
DB
DB
DB
DB
DB
7
6
5
4
0
0
1
1
1
Display start lines
1
1
( 0 to 63 )
1
0
1
1
1
Y-address
0
1
( 0 to 63 )
R
B
ON
E
U
/
0
S
0
S
OFF
E
Y
T
Write Data
Read Data
R/W
D/I DB
7
0
0
0
DB
DB
DB
3
2
1
0
Turns ON / OFF total display. Data and internal
status in the display RAM remain unchanged.
1
1
1/0
1: ON
Determines the RAM line to be displayed on the
top line (COM1) on the display.
X-address(page)
Sets the X-address of the RAM (page) in the X-
(0 to 7)
address (page) register.
Set Y-address of the RAM in the Y-address
counter.
Reads the status.
RESET
ON/OFF 1: Display OFF
0
0
0
BUSY
Writes data DB
DB
(MSB ) on the data bus
7
into the display RAM.
Reads data DB
DB
(MSB) from the display
7
RAM into the data bus.
0
1
1
1
When the display is turned OFF by D=0, the
- 16 -
AN.No.G121600N000-3D0E
Function
0 : OFF
1: Reset 0: Normal
0: Display ON
1: during internal operation
0: READY status
(LSB) to
Accesses the RAM
0
in which address
has been specified
beforehand. After
that the Y-address
advances by one.
(LSB) to
0
≤ 3/Fφ).
BUSY
DB
0
1
1
D
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