Datasheet
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Page 4
EA DOGS104-A
APPLICATION EXAMPLES
Different wiring must be used depending on the interface.
Note that the COG technology means that the current capacity of the outputs is limited. Therefore, a
large load on the bus may cause signal loops and unclean levels. If in doubt, additional pull-down
resistors (8051) are required or additional waits/NOPs must be incorporated.
12:00 VIEWING ANGLE, TOP VIEW OPTION
If the display is read mostly from above (on the front of a laboratory power
supply unit, for example), the preferred angle of viewing can be set to 12
o’clock. This rotates the display by 180°. A slightly different initialization
setup is required for this. The line address is incremented by 10.
INITIALISATION EXAMPLE
Initialization Example SPI and I2C
Command
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Hex
Remark
Function Set
0 0 0 0 1 1 1 0 1 0
$3A 8 bit data length extension Bit RE=1; REV=0
Extended function set
0 0 0 0 0 0 1 0 0 1
$09 4 line display
Entry mode set
0 0 0 0 0 0 0 1 1 0
$06 bottom view
Bias setting
0 0 0 0 0 1 1 1 1 0
$1E BS1=1
Function Set 0 0 0 0 1 1 1 0 0 1 $39 8 bit data length extension Bit RE=0; IS=1
Internal OSC
0 0 0 0 0 1 1 0 1 1
$1B BS0=1 -> Bias=1/6
Follower control
0 0 0 1 1 0 1 1 1 0
$6E Devider on and set value
Power control
0 0 0 1 0 1 0 1 1 0
$56 Booster on and set contrast (DB1=C5, DB0=C4)
Contrast Set
0 0 0 1 1 1 1 0 1 0
$7A Set contrast (DB3-DB0=C3-C0)
Function Set
0 0 0 0 1 1 1 0 1 0
$38 8 bit data length extension Bit RE=0; IS=0
Display On
0 0 0 0 0 0 1 1 1 1
$0F Display on, cursor on, blink on
Change view
Command
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Hex
Remark
Function Set 0 0 0 0 1 1 1 0 1 0 $3A 8-Bit data length extension Bit RE=1; IS=0
Entry Mode
0 0 0 0 0 0 0 1 BDC BDS
$0X $06=bottom view; $05 = top view
Function Set 0 0 0 0 1 1 1 0 0 0 $38 8-Bit data length extension Bit RE=0; IS=0
Orientation 6:00 (Bottom View)
Orientation 12:00 (Top View)