PT6583 Datasheet, PDF (5/6 Pages) Princeton Technology Corp – LCD Driver IC with Key Input Function

LCD Driver IC with Key Input Function
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URL: http://www.princeton.com.tw
PT6583
1/3 Bias Application Circuit (for Large Panels)
+5V
R
R
CC
R
FROM THE
CONTROLLER
TO THE
CONTROLLER
VDD
VSS
TEST
OSC
VDD1
VDD2
/RST
CE
CLK
DI
DO
COM1
COM2
COM3
COM4
P1/SG1
P4/SG4
SG5
SG6
SG54
SG55
(P1) _{General Purpose}
(P2) _{Output Ports}
(Used for functions i.e.
(P4) backlight control)
SG56
SG57
=
KEY MATRIX
(UP TO 30 KEYS)
Notes:
1. A capacitor can be connected to the power supply line to make the Power Supply Voltage
VDD rise time (when power is applied) and the power supply Voltage VDD fall time (when
power drops) are at least 1ms when PT6583 is reset via VDET.
2. If the /RST Pin is not used to initiate the System Reset Function, it must be connected to
VDD.
3. The DO Pin is an open-drain output and therefore needs a pull-up resistor. This resistor must
be between 1k to 10k Ohms. The value of this resistor must be in accordance with that the
capacitance of the external wiring so that the signal waveforms are in proper form.
4. C>0.047uF
PT6583 ver 1.0
Page 5
Updated Dec. 2001