Epson SED 1520 Series User Manual download pdf (Page 28)

S-MOS SYSTEMS, INC.

4.0 Commands 4.1 – 4.5

4.1 Display ON/OFF

This command forces all display to turn on or off.

R/W

A0 RD WR D7 D6 D5 D4 D3 D2 D1 D0

0101010111D

Note:

D = 0 Display OFF

D = 1 Display ON

4.2 Display Start Line

This command specifies a line address (shown in

Figure 3.3) thus marking the display line that corre-

sponds to COM0. Display begins with the specified

line address and covers as many lines as match the

display duty in address ascending order. Dynamic

line address change with the Display Start Line com-

mand enables column-wise scrolling or page change.

R/W

A0 RD WR D7 D6 D5 D4 D3 D2 D1 D0

0 1 0 1 1 0 A4 A3 A2 A1 A0

← High order bits

A4 A3 A2 A1 A0

Line Address

00000 0

00001 1

↓↓

11111 31

4.3 Set Page Address

This command is used to specify a page address

equivalent to a row address for MPU access to the

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.

R/W

A0 RD WR D7 D6 D5 D4 D3 D2 D1 D0

010101110A1A0

4.4 Column Address

This command specifies a display data RAM column

address. The column address is incremented by 1

each time the MPU accesses from the set address to

the display data RAM. Thus it is possible for the MPU

to gain continuous access to only the data. This

incrementing stops with address 80; the page ad-

dress is not continuously changed.

R/W

A0 RD WR D7 D6 D5 D4 D3 D2 D1 D0

0 1 0 0 A6 A5 A4 A3 A2 A1 A0

A6 A5 A4 A3 A2 A1 A0

Column

Address

0000000 0

0000001 1

↓↓

1001111 79

4.5 Read Status

R/W

A0 RD WR D7 D6 D5 D4 D3 D2 D1 D0

001

BUSY ADC RESET

0000

Note:

BUSY BUSY being “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 ↔ seg-

ment driver n)

1 : Forward (column address n ↔ segment

driver n)

ON/OFF Indicates display on or off.

0 : Display on

1 : Display off

This bit has polarity reverse to the Display ON/

OFF command.

RESET Indicates that system is being initialized by the

RES signal or the Reset command.

0 : Display mode

1 : Being reset

ON /

OFF

A1 A0 Page

000

011

A1 A0 Page

102

113

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 55 56

Comments to this Manuals

No comments

Epson SED 1520 Series User Manual Page 28

Comments to this Manuals

Related products and manuals for Unknown Epson SED 1520 Series