PT6332 Datasheet, PDF (34/37 Pages) Princeton Technology Corp – VFD Driver/Controller IC

VFD Driver/Controller IC
APPLICATION CIRCUIT
Key matrix with up to 25 keys
MCU
VDD
*
5V/3.3V
33p 12K
61 VSS1
62 KS1
63 KS2
64 KS3
65 KS4
66 KS5
67 KI1
68 KI2
69 KI3
70 KI4
71 KI5
72 DT
73 /BLK
74 DO
75 CE
76 CL
77 DI
78 VDD
79 OSCI
80 VSS2
PT6332
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URL: http://www.princeton.com.tw
PT6332
SG21
40
SG22
39
SG23
38
SG24
37
SG25
36
SG26
35
SG27
34
SG28
33
SG29
32
SG30
31
SG31
30
SG32
29
SG33
28
SG34
27
SG35
26
SG36
25
SG37
24
SG38
23
SG39
22
SG40
21
Note: *- Since DO is an open-drain output, a pull-up resistor is required. Select a value in the range 1 to
10KΩ that is most appropriate for the capacitance of the external lines so that the waveform is not
distorted.
PT6332 V1.0
- 34 -
February, 2006