ST7070 View Datasheet(PDF) - Sitronix Technology Co., Ltd.
Part Name
Description
MFG CO.
'ST7070' PDF : 51 Pages View PDF
ST7070
Cursor or Display Shift
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Code 0 0 0 0 0 1 S/C R/L x x
Without writing or reading of display data, shift right/left cursor position or display. This instruction is used to
correct or search display data. During 2-line mode display, cursor moves to the 2nd line after 40th digit of 1st
line. Note that display shift is performed simultaneously in all the line. When displayed data is shifted
repeatedly, each line shifted individually. When display shift is performed, the contents of address counter are
not changed.
S/C
L
L
H
H
R/L
Description
AC Value
L Shift cursor to the left
AC=AC-1
H Shift cursor to the right
AC=AC+1
L Shift display to the left. Cursor follows the display shift AC=AC
H Shift display to the right. Cursor follows the display shift AC=AC
Function Set
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Code 0 0 0 0 1 DL N EXT x x
DL : Interface data length control bit
When DL = "High", it means 8-bit bus mode with MPU.
When DL = "Low", it means 4-bit bus mode with MPU. So to speak, DL is a signal to select
8-bit or 4-bit bus mode.
When 4-bit bus mode, it needs to transfer 4-bit data by two times.
N : Display line number control bit
When N = "Low", it means 1-line display mode.
When N = "High", 2-line display mode is set.
EXT : Select basic or extended instruction set
When EXT=”L” the commands ‘Entry Mode Set’ , ‘Set CGRAM address’ and ‘Set DDRAM address’ can be
performed , when EXT=”H” the commands ‘Bias resistor select’ , ‘COM、SEG direction select’ and ‘Set
display data length’ can be performed. Other command can be executed in both cases.
When EXT=”L” : disable extension instruction
When EXT=”H” : enable extension instruction
V1.4
18/51
2009/04/29
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