SL20T0081 View Datasheet(PDF) - System Logic Semiconductor
Part Name
Description
MFG CO.
'SL20T0081' PDF : 56 Pages View PDF
SLS System Logic Semiconductor
SL20T0081
Column Address Circuit
Column Address circuit has an 8-bit preset counter that provides column address to the Display Data RAM as show in
figure 7. When Set Column Address MSB/LSB instruction is issued, 8-bit [Y7:Y0] is updated. And, since this address
is increased by 1 each or write data instruction, microprocessor can access the display data continuously. However,
the counter is not increased and locked if a non-existing address above 84H. It is unlocked if a column address is set
again by set Column Address MSB/LSB instruction. And the Column Address counter is independent of page address
register.
ADC Select instruction makes it possible to invert the relationship between the Column Address and the segment
outputs.It is necessary to rewrite the display data on built-in RAM after issuing ADC select instruction. Refer to the
following figure 7.
Figure 7. The Relationship between Column Address and Segment output
SEG Output
Column Address
Display Data
SEG SEG SEG SEG SEG
0
1
2
3
4
00H 01H 02H 03H 04H
1
0
1
1
0
LCD panel
SEG SEG SEG SEG SEG
127 128 129 130 131
7FH 80H 81H 82H 83H
1
0
0
1
0
ADC = 0
ADC = 1
Segment Control Circuit
This circuit controls the display data by the display ON/OFF, reverse display ON/OFF and entire display ON/OFF
instructions without changing the data in display data RAM.
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