PT6523_10 Datasheet, PDF (8/23 Pages) Princeton Technology Corp – 1/3 Duty General Purpose LCD Driver IC

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1/3 Duty General Purpose LCD Driver IC
PT6523
/INH AND DISPLAY CONTROL
When power is first applied, the PT6523 internal data are not defined (D1 to D156, DR, SC and BU).
The display is turned off (SG1 to SG52, COM1 to COM3 are all set to “Low” Level) by setting the /INH
pin to “Low” at the same time the power is applied. (Please note that when the /INH Pin is set to “LOW”,
the OSC Pin is not active.) As a result of this, irrelevant display at the time of the power ON can be
eliminated if not prevented by transferring the serial data from the controller while the display is OFF
and by setting the /INH pin after the transfer is completed. Please refer to figures below.
VDD
/I N H
CE
VIL
t1
t2
D IS PLA Y & C ON TR O L
D ATA TR A N SF ER
VIL
INTERN AL
D ATA
U N D EF IN E D
where:
1. t1 is determined by the value of C and R.
2. t2=10µs (minimum)
3. Vcc=4.5V to 6.0V
D EF IN E D
Figure 1
VDD
R
/INH
C
PT6523 V1.8
-8-
July, 2007