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16x2 Character LCD (Parallel Interface)

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16x2 Character LCD (Parallel Interface)
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16x2 Character LCD (Parallel Interface)

This 16-character, 2-line parallel liquid crystal display achieves a large viewing area in a compact package. It uses the common HD44780 interface (330k pdf), so sample interface code is widely available for a variety of microcontrollers. This LCD is also available with a backlight.

The DDRAM address 0x00 corresponds to the first character of the top line, address 0x0F corresponds to the last character of the top line, address 0x40 corresponds to the first character of the second line, and address 0x4F corresponds to the last character of the second line.

You can find sample HD44780 LCD interface code written for a variety of AVR microcontrollers as part of the Pololu AVR library.

Pin Symbol Function
1 Vss ground (0 V)
2 Vdd 5 V logic supply voltage
3 Vo contrast adjustment
4 RS H/L register select signal
5 R/W H/L read/write signal
6 E H/L enable signal
7-14 DB0 – DB7 H/L data bus for 4- or 8-bit mode
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