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Relationship between display data RAM locations and Addresses - example shows
display start line set to 08
NOTE: Display RAM goes from columns 0 - 79 but only columns 0 - 69 are displayable. If ADC status bit = 0 columns
79 - 10 are displayable.
Relation entre les emplacements et les adresses de mémoire RAM des données
d'affichage - l'exemple ci-dessous montre la ligne de départ d'affichage placée sur 08
REMARQUE:
La mémoire RAM d'affichage va des colonnes 0 à 79 mais seules les colonnes 0 à 69 peuvent être
affichées. Si le bit d'état de l'ADC = 0, les colonnes 79 à 10 peuvent être affichées.
Verhältnis zwischen den Anzeigedaten-RAM-Stellen und Adressen Das Beispiel zeigt
die Anzeigestartzeile auf 08 eingestellt.
ANMERKUNG:
Der Anzeige-RAM geht von Spalte 0 79, obwohl nur die Spalten 0 69 sichtbar sind. Wenn das ADC-
Statusbit = 0, können die Spalten 79 10 erscheinen.
Rapporto tra le posizioni di RAM dei dati del display e gli indirizzi l'esempio mostra
la riga di inizio del display impostata a 08
NOTA:
La RAM del display comprende le colonne da 0 a 79, ma sono visualizzabili soltanto le colonne da 0 a 69.
Se il bit di stato ADC = 0, sono visualizzabili le colonne da 79 a 10.
Page Address
DATA
Adresse de page
DONNEES
Seitenadresse
DATEN
Indirizzo di pagina
DATI
D0
D1
PAGE 0
D2
D1, D2 = 0,0
D3
SEITE 0
D4
PAGINA 0
D5
D6
D7
D0
D1
PAGE 1
D2
0, 1
D3
SEITE 1
D4
PAGINA 0
D5
D6
D7
D0
D1
PAGE 2
D2
1, 0
D3
SEITE 2
D4
PAGINA 0
D5
D6
D7
D0
D1
PAGE 3
D2
D3
SEITE 3
1, 1
D4
PAGINA 0
D5
D6
Assignment
Line Address
Associated line (ex.)
Gemeinsamer
Allocation
Adresse de ligne
Ligne associée (ex.)
Zuordnung
Zugehörige Zeile
Zeilenadresse
Assegnazione
Riga associata (es.)
Indirizzo di riga
00
01
02
03
04
05
06
07
08
Start
09
Début
Start
0A
D
Z
A
A
Inizio
I
O
N
R
0B
S
N
Z
E
0C
P
E
E
A
0D
L
I
0E
A
D'
G
D
0F
Y
A
E
I
F
F
10
S
A
F
L
P
11
R
I
Ä
L
12
E
C
C
A
13
H
A
H
Y
14
A
E
G
15
E
16
17
18
19
1A
1B
1C
1D
1E
1F
14
INSTRUCTIONS
1. Display ON/OFF
2. Display Start Line
corresponds to ROW 0. Display begins with the specified line address and covers lines in
ascending order. Dynamic line address change with the Display Start Line commands
enables column-wise scrolling or page change.
3. Set Page Address
display data RAM. A required bit of the display data RAM can be accessed by specifying its page address and column
address. Changing the page address causes no change in display.
4. Column Address
1 each time the MPU accesses the display data RAM. Thus it is possible for the MPU to gain continuous access to only the
data. The incrementing stops with address 79, the page address is not continuously changed.
5. Read Status
BUSY: BUSY = '1' means that system is performing an internal operation or is reset. No command is accepted before
BUSY = '0'. As long as the cycle time requirement is met, no BUSY check is needed.
ADC: Indicates assignment of column addresses to segment drivers.
0: Inverted (column address 79-n segment driver n).
1: Forward (column address n segment driver n).
Common
Input
ON/OFF: Indicates display on or off.
Entrée
commune
0: Display on.
1: Display off.
Ausgang
Ingresso
RESET: Indicates that system is being initialized by the RES signal or the Reset command.
comune
COM 0
0: Display mode.
1
1: Being reset.
2
3
6. Write Display Data
4
written, the column address is automatically incremented by 1, this enables the MPU to write multi-word data
5
continuously.
6
7
8
7. Read Display Data
9
column address and a page address. Once the data is read, the column address is automatically incremented by 1, this
10
enables the MPU to read multi-word data continuously. A dummy read is needed immediately after the column address is
11
set.
12
13
14
8. Select ADC
- This command inverts the relation of assignments between display data RAM column addresses and segment
15
driver outputs. In other words, the Select ADC command can software invert the order of segment driver output pins.
16
Incrementing the column address by 1, which takes place after the MPU writing or reading display data, follows the
17
sequence of column addresses.
18
D=0: Clockwise output (forward).
19
20
21
9.
Static Drive ON/OFF
22
D=0 Static drive off.
23
24
10. Read Modify Write
25
address will be incremented not by the Read Display data command but by the Write Display Data command only. This
26
27
mode will stay until the End command is entered. Entry of the End command causes the column address to return to the
28
address which was valid when the Read Modify Write command was entered. This function lessens the load of the MPU
29
when the data in a specific display area is repeatedly updated (as blinking cursor). Even in the Read Modify Write mode,
30
any command other than Read/Write Data and Set Column Address may be used.
31
11. End
- This command cancels the Read Modify Write command, returning the column address to the initial mode address.
12. Reset
- This command initializes the display start line register, column address counter and page address counter without
any effect on the display data RAM. The reset operation follows entry of the Reset command. Initialization at power-on is
performed not by the Reset command but by an internal power-on Reset circuit.
- This command turns the display on and off.
- This command specifies a line address thus making it the line that
- This command is used to specify a page address equivalent to a row address for MPU access to the
- This command specifies the display data RAM column address. The column address is incremented by
This bit is the reverse of the select ADC command.
This is the reverse of the Display ON/OFF command.
RES is generated internally at Power On.
- This command allows the MPU to write 8 bits of data into the display data RAM. Once the data is
- This command allows the MPU to read 8 bits of data from the display data RAM location specified by a
D=1: Anticlockwise output (reverse).
- This command forces all display to be on and, at the same time, all common output to be selected.
D=1: Static drive on
- This command is used with the End command in a pair. Once it has been entered, the column
3
ENGLISH
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