PCF8574 LCD Module 1602 1602A 2004 2004A 12864 12864B LCD Display Module Blue Yellow-Green Screen Display IIC I2C 5V for Arduino M.(2*2)
The standard 16X2 LCD character module (backlit / blue screen)
1602 using a standard 16-pin interface including:
1 foot: VSS ground power
2 feet: VDD of 5V positive power
Pin 3: V0 LCD display contrast adjustment end connected to the positive power supply contrast weakest grounded power highest contrast the contrast is too high will produce"ghosting" by using a 10K potentiometer to adjust the contrast
4-pin: RS register select the data register select high and low select the instruction register.
Pin 5: R / W for read and write signal line a high read operation write operation is low. When the RS and RW can write low instruction or display address when RS is high whenthe low RW can read busy signal when RS is high RW can write low data.
: E end of the first 6 feet to enable end When E Duanyou high jump goes low the LCD module execute command.
7 to 14 feet: D0 ~ D7 8-bit bi-directional data line.
15 feet: backlight power supply positive
16 feet: backlit negative supply
1602 LCD module within the character occurred memory (CGROM) has been stored in a 160 dot matrix characters graphics as shown in Table 1 these characters: Arabic numerals the case of the letters of the alphabet commonly used symbols and Japanese kana each character has a fixed code such as the code of the uppercase letters "A" is01000001B (41H) display module address 41H dot matrix character graphics show up we will be able to see the letter "A . "