Epson SED 1520 Series EPSON, SED1520 Series, Command Description

SED1520 Series

Command Description

Table 3 is the command table. The SED1520 series identifies a data bus using a combination of A0 and R/W (RD or WR) signals. As the MPU translates a command in the internal timing only (independent from the external clock), its speed is very high. The busy check is usually not required.

Display ON/OFF


			R/W
A0		RD	WR	D7	D6	D5	D4	D3	D2	D1	D0

0	1		0	1	0	1	0	1	1	1	D	AEH, AFH

This command turns the display on and off.

•D=1: Display ON

•D=0: Display OFF

Display Start Line

This command specifies the line address shown in Figure 3 and indicates the display line that corresponds to COM0. The display area begins at the specified line address and continues in the line address increment direction. This area having the number of lines of the specified display duty is displayed. If the line address is changed dynamically by this command, the vertical smooth scrolling and paging can be used.

R/W

C0H to DFH

This command loads the display start line register.

A4	A3	A2 A1 A0			Line Address

0	0	0	0	0	0
0	0	0	0	1	1
		:			:
		:			:
1	1	1	1	1	31

See Figure 2.

Set Page Address

This command specifies the page address that corresponds to the low address of the display data RAM when it is accessed by the MPU. Any bit of the display data RAM can be accessed when its page address and column address are specified. The display status is not changed even when the page address is changed.

				R/W
	A0		RD	WR	D7	D6	D5		D4		D3	D2	D1	D0
	0	1		0	1	0	1		1		1	0	A1	A0	B8H to BBH

This command loads the page address register.

								A1 A0		Page

								0	0		0
								0	1		1
								1	0		2
								1	1		3

See Figure 2.

SED1520	Series

EPSON

2–15