HD66520 Datasheet, PDF (14/45 Pages) Hitachi Semiconductor – 160-Channel 4-Level Grayscale Display Column Driver with Internal Bit-Map RAM

HD66520T
How to Use the SHL Pin
It is possible to invert the relationship between the addresses and output pins Y1 to Y160 by setting the
SHL pin (Figure 9). The upper left section on the screen can be assigned to address H’0000 regardless of
which side of the LCD panel the HD66520 is connected to.
The Relationship between the Data Bus and Output Pins
The 8-bit data on the data bus has a 2-bit/pixel configuration for a 4-level grayscale display. In addition,
the 8-bit data on the data bus has a relationship as shown in table regardless of the relationship between
pins LS0, LS1, and SHL.
Table 1 Data Bus and Output Pins
Data Bus
DB 0, 1
DB 2, 3
DB 4, 5
DB 6, 7
Output Pins
Y1
Y5
Y2
Y6
Y3
Y7
Y4
Y8
·········
·········
·········
·········
Y153
Y154
Y155
Y156
Y157
Y158
Y159
Y160
HD66520 HD66520
Y1 Y160 Y1 Y160
320
480
LCD panel
HD66520 HD66520
Y160 Y1 Y160 Y1
320
480
LCD panel
Y160 Y1 Y160 Y1
HD66520 HD66520
Y1 Y160 Y1 Y160
HD66520 HD66520
When the HD66520 is connected to the
back of the panel (SHL = Low).
When the HD66520 is connected to the
front of the panel (SHL = High).
Figure 9 Address Assignment and SHL Pin Setting
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