
Dot Matrix LCD Driver
S-4543A
22
Seiko Instruments Inc.
Code
Command
A
0
R/W
X
WRX
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
Description
Display ON/OFF 0
1
0
1
0
1
1
1
0
/
1
Selects normal display or all off on the screen.
D
0
: 1ON. Normal display operation using
the display data RAM.
D
0
: 0OFF. Display OFF status regardless of
the display RAM data. Power Save
mode is entered by display OFF and
display all-lit ON.
Sets the line address of the display data RAM
to be displayed at the top line of the screen
(COM
0
output). Address setting ranges from 0
to 31.
Sets up the page address of the display data
RAM in order to access the display data RAM
from the MPU. Address setting ranges from 0
to 4.
Sets up the column address of the display
data RAM in order to access the display data
RAM from the MPU. Address setting ranges
from 0 to 79.
Reads the status.
BUSY
1: Command operation
0: Command ready
ADC
1: Column address forward
0: Column address invert
Display
1: Display all-off status
ON/OFF 0: Normal display status
RESET
1: Resetting
0: Normal operation
Writes the data D
0
through D
7
on the
display data RAM.
When accessing the display
data RAM, the column
address is automatically
incremented.
Display START
Line
0
0
1
1
0
Display start line address
(See Table 21)
Page Address
Set
0
0
1
0
1
1
1
Page address
(See Table 20)
Column
Address Set
0
0
0
Column address
(See Table 21)
Status Read
0
1
Busy
ADC
Dis-
play
ON/
OFF
Reset
0
0
0
0
Write Display
Data
1
0
Data written into the displayed data RAM
Read Display
Data
1
1
Data read from the displayed data RAM
Reads the data D
through D
7
from the
display data RAM.
Used to invert the column address of the
display data RAM, after which the correlation
between the display RAM’s addresses and
segment output terminals is inverted.
D
0
: 0 Forward
D
0
: 1 Reverse
Selects normal display operation or all-lit
display operation.
D
0
: 0 Normal display operation
D
: 1 All-lit display operation
The screen is changed to all-lit status. Power
Save mode is entered through display OFF
and display all-lit ON.
Increments the column address of display data
RAM only when display data is written but not
when it is read.
Cancels Read Modify Write mode and
increments the column address of the display
data RAM when display data is written and
read.
Resets the address of the display data RAM
as follows:
Resets the Display START Line to the 1st
line.
Resets the page address to 3.
ADC Select
0
0
1
0
1
0
0
0
0
0
/
1
Display all-lit
ON/OFF
0
0
1
0
1
0
0
1
0
0
/
1
Read Modify
Write
0
0
1
1
1
0
0
0
0
0
End
0
0
1
1
1
0
1
1
1
0
Reset
0
0
1
1
1
0
0
0
1
0
Table 20
Display Commands
Sets the display RAM’s
Set and Column Address Set.