HD66113T Datasheet, PDF (18/20 Pages) Hitachi Semiconductor – (120-Channel Common Driver Packaged in a Slim Tape Carrier Package)

HD66113T
Notes on Power-On/Off of the LCD Driver
To prevent an LCD driver display error at power on/off, the sequence for power-on signal activation must
be as follows (see Figure 12):
2.7V
V_CC
2.7V
VLCD
0ms
0ms
0ms
0ms
DISP
Input signals such as
CL1, CL2, and Data
Signal non-fixed Initializing period
period
(1frame or longer)
Figure 12 Sequence of Power-On/Off
At Power On
(1) Power on V_CC. At this time, input 0 to the DISP pin.
(2) Display-off function forces the LCD driver to output a V2 level (lowest level).
(3) Display-off function takes priority even if the input signal status becomes irregular immediately after
V_CC power-on.
(4) Input the specified signals to initialize registers of the LCD driver. Its period must be 1 frame or longer.
(5) Set the DISP level to 1 to cancel display-off function after steps (1) to (4). At this time, VLCD and each
V pin input must be at the specified levels.
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