Panasonic CQ-4400U, Service Manual

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IC901 YEAMLC75853E
Pin
No.
Name Description I/O Volt(V)
1 (NC) - - -
2 P.LED LED Indicator Signal
Output O 0
3~|40 S3~S40 LCD Segment O 2.7
41 COM1 LCD Common O 2.7
42 COM2 LCD Common O 2.7
43 COM3 LCD Common O 2.7
44~49 KS1~KS6 Key Data Output O 5.3
50~54 K11~K15 Key Data Input I 0
55 TEST (Connect to Ground) - 0
56 VDD +5V Power Supply - 5.3
57 VDD1 +5V Power Supply - 3.5
58 VDD2 +5V Power Supply - 1.8
59 VSS (Connect to Ground) - 0
60 OSC CR Oscillator - 3.9
61 DO LCD Data Output O 5.2
62 CE Chip Enable I 0.3
63 CLK LCD Clock Input I 0
64 DI LCD Data Input I 0
16. PACKAGE AND IC BLOCK DIAGRAM
16.1. Main Block
10