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ATmega169P Datasheet(PDF) 241 Page - ATMEL Corporation

Part # ATmega169P
Description  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
PDF  393 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega169P Datasheet(HTML) 241 Page - ATMEL Corporation

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8018N–AVR–08/09
ATmega169P
23.4
LCD Usage
The following section describes how to use the LCD.
23.4.1
LCD Initialization
Prior to enabling the LCD some initialization must be preformed. The initialization process nor-
mally consists of setting the frame rate, duty, bias and port mask. LCD contrast is set initially, but
can also be adjusted during operation.
Consider the following LCD as an example:
Figure 23-8. LCD usage example.
Display:
TN Positive, Reflective
Number of common terminals:
3
Number of segment terminals:
21
Bias system:
1/3 Bias
Drive system:
1/3 Duty
Operating voltage:
3.0 ± 0.3 V
1b
1c
2a
2b
2c
2e
2f
2d
2g
COM3
COM0
COM1
COM2
SEG0
SEG1
SEG2
1b,1c
2c
2f
2a
2d
2g
2b
2e
..
SEG0
SEG1
SEG2
ATmega169
Connection table
LCD
51
50
49
48
47
46
45



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