pt6553 Princeton Technology Corp., pt6553 Datasheet - Page 3

• Manufacturer Part Number: pt6553
• Description: Lcd Driver Ic With Key Input Function
• Manufacturer: Princeton Technology Corp.

LCD Driver IC with Key Input Function
APPLICATION CIRCUIT 1
1/2 BIAS (FOR NORMAL PANEL USE)
68K
Notes:
1. Connect a capacitor to the power supply line so that the when the PT6553 is reset by the V
2. Since the DO Pin is an open drain output, it needs a pull-up resistor (1K to 10KΩ) which is
PT6553 V1.7
power supply V
power drops are both at least 1ms.
appropriate for the capacitance of the external wiring so that the waveforms are not degraded.
820pF
C 0.047
Key matrix
(up to 30 keys)
>
+5V
MCU
μ
F
DD
+5V
C
rise time when power is applied and the power supply voltage V
(general-purpose
output ports)
Used with the
backlight controller
or other ciucuit.
*2
*1
49
50
52
53
54
55
56
57
58
59
60
62
63
64
51
61
KO6
KI1
KI2
KI3
KI4
KI5
TEST
VDD
VDD1
VDD2
VSS
OSC
DO
CE
CLK
DI
(P1)
(P2)
(P3)
(P4)
- 3 -
P 6553
T
URL: http://www.princeton.com.tw
SG32
SG30
SG29
SG28
SG27
SG26
SG25
SG24
SG23
SG22
SG20
SG19
SG18
SG17
SG31
SG21
DD
Fax: [phone]
Tel: [phone]
November, 2007
29
28
24
23
22
20
32
30
27
25
21
19
18
17
31
26
fall time when
PT6553
DET
, the