#2691: LCD Screen & Keypad Arduino Shield (LCD1602)

R69.80

This great Arduino shield contains an LCD screen and a keyboard. It is perfect for those new to Arduino.

1 VSS Power Ground 9 D2 Data

2 VDD Power Positive 10 D3 Data

3 VL liquid crystal display bias 11 D4 data

4 RS Data / Command Select 12 D5 data

5 R / W R / W Selects 13 D6 data

6 E Enable signal 14 D7 data

7 D0 Data 15 BLA Backlight Positive

8 D1 Data 16 BLK Backlight negative

1 feet: VSS for the ground power.

2 feet: VDD 5V power supply is connected.

3 feet: VL for LCD contrast adjustment side, then the power supply is the weakest contrast, grounding contrast

Maximum, high contrast will produce "ghosting", can be used when a 10K potentiometer to adjust the contrast.

4 feet: RS for the register selection, select the high data register, low when the instruction select register.

5 feet: R / W for the read and write signal lines, high when the read operation, low when the write operation. When RS

And R / W together for the low level can be written to the instruction or display address, when the RS is low when the R / W is high

Can read busy signal, when RS is high level R / W is low level can write data.

6 feet: E-side is enabled, when the E-level jump from high to low, the LCD module to execute the command.

7 to 14 feet: D0 ~ D7 for the 8-bit bi-directional data lines.

15 feet: backlight cathode.

16 feet: backlight negative.

1602LCD the instructions:

1602 LCD module internal controller a total of 11 control instructions, as shown in the table below:

No. Instruction RS R / W D7 D6 D5 D4 D3 D2 D1 D0

1 Clear screen 0 0 0 0 0 0 0 0 0 1

2 Cursor Return 0 0 0 0 0 0 0 0 1 *

3 Set input mode 0 0 0 0 0 0 0 1 I / D S

4 Display On / Off Control 0 0 0 0 0 0 1 D C B

5 Cursor or character shift 0 0 0 0 0 1 S / C R / L * *

6 Set Function 0 0 0 0 1 DL N F * *

7 Set character generation memory address 0 0 0 1 Character generation memory address

8 Set data memory address 0 0 1 Display data memory address

9 Read busy flag or address 0 1 BF counter address

10 Write to CGRAM or DDRAM) 1 0 Data to be written

11 Read data from CGRAM or DDRAM 1 1 Read the data contents

1602 LCD module read and write operations, the screen and cursor operations are programmed through the instructions to achieve. (Note: 1 is high, 0 is low)

Product Details

Instruction 1: Clear display, instruction code 01H, cursor reset to address 00H.

Command 2: The cursor is reset and the cursor returns to address 00H.

Instruction 3: Cursor and display mode setting I / D: Cursor moving direction, high level shifting to the right, low level moving left S:

All text on the screen moves left or right. High level means active, low level is invalid.

Command 4: Display switch control. D: control the overall display on and off, said high-open display, low power

Flat display off display C: control cursor on and off, high means that there is a cursor, low level that no cursor B: control

Whether the cursor is flashing, high level flashing, low level does not flicker.

Instruction 5: Cursor or display shift S / C: Moves the displayed text at high level, and moves the cursor at low level.

Instruction 6: Function setting command DL: 4-bit bus at high level, 8-bit bus at low level N: Low power

Usually single-line display, high-level double-line display F: low level display 5x7 dot matrix characters, high level display

5x10 dot matrix characters.

Command 7: Character generator RAM address setting.

Instruction 8: DDRAM address setting.

Instruction 9: Read busy signal and cursor address BF: Busy flag, high level means busy, then module can not connect

Command or data received, if the low level that is not busy.

Command 10: Write data.

Command 11: Read data.

Compatible with the HD44780 chip timing table is as follows:

Read status input RS = L, R / W = H, E = H Output D0-D7 = Status word

Write command input RS = L, R / W = L, D0-D7 = Instruction code, E = High pulse output None

Read data input RS = H, R / W = H, E = H output D0-D7 = data

Write Data Inputs RS = H, R / W = L, D0-D7 = Data, E = High Pulse Output None

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