PT6584 Datasheet, PDF (34/42 Pages) Princeton Technology Corp – LCD Driver IC

LCD Driver IC
1/2 BIAS APPLICATION CIRCUIT
(FOR NORMAL PANEL USE)
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Fax:[phone]
URL:http://www.princeton.com.tw
PT6584
Ke y Ma trix
(up t o 3 0 keys)
+ 5V
*2 ^{+ 5.5 V}
C *1
68 0p
43 KΩ
*4
V
MC U
61 KS6
62 KI1
63 KI2
64 KI3
65 KI4
66 KI5
67 VD D
68 VLC D
69 VLCD 1
70 VLCD 2
71 VSS
72 TEST
73 OSC
74 /RES * 3
75 DO
76 CE
77 C L
78 DI
79 P1/S1
80 P2/S2
PT65 84-L Q
S42 40
S41 39
S40 38
S39 37
S38 36
S37 35
S36 34
S35 33
S34 32
S33 31
S32 30
S31 29
S30 28
S29 27
S28 26
S27 25
S26 24
S25 23
S24 22
S23 21
Notes:
1. C ≥ 0.047µF
2. Add a capacitor to the logic block power supply line so that the logic block power supply voltage
VDD rise time when power is applied and the logic block power supply voltage VDD fall time when
power drops are both at least 1ms, as the PT6584 is reset by the VDET.
3. If the /RES pin is not used for system reset, it must be connected to the logic block power supply
VDD.
4. The DO pin, being an open-drain output, requires a pull-up resistor. Select a resistance (between 1
to 10KΩ) appropriate for the capacitance of the external wiring so that signal waveforms are not
degraded.
PT6584 V1.1
- 34 -
August, 2006