lcd display pic microcontroller made in china

In the previous chapter, we have discussed how a character LCD is interfaced with a PIC microcontroller in 8-bit mode, where we used predefined characters stored in the LCD to display our data. In this article, we will learn more about the LCD and how we can create and use custom characters.

DDRAM or “Data Display Random Access Memory” is the working data buffer of the display. Each character on the display has a corresponding DDRAM location and the byte loaded in DDRAM controls which character is displayed.

CGROM or “Character Generation Read Only Memory” holds all the standard patterns for the 5 x 7 dot matrix characters. For instance, if you want to display character “A”, you would send ASCII code 65 (decimal) to the DDRAM. The display controller looks up the pattern of dots to display for this code in the CGROM and lights up the ones appropriate for “A”. The CGROM contents depend on the particular character set and model of display, US, Chinese etc. and cannot be changed.

CGRAM or “Character Generation Random Access Memory” allows the user to define special supplementary non-standard character types that are not in the CGROM. You can load your own dot pattern shapes and call these up for display.

For making custom patterns we need to write values to the CGRAM area defining which pixel to glow. These values are to be written in the CGRAM address starting from 0x40. CGRAM has a total of 64 Bytes. For LCD using 8×5 dots for each character, you can define a total of 8 user defined patterns (1 Byte for each row and 8 rows for each pattern).

Custom characters are assigned fixed display codes from 0 to 7 for pattern stored in the location pointed by CGRAM address 0x40, 0x48, 0x56… and so on. So, if the user wants to display second pattern (pattern stored at CGRAM address 0x48), simply call the data function with value 1 as an argument at a desired location in the LCD.

To display the sequence in the LCD, we need to specify the position on LCD and which pattern to display at the position. Provide adequate delay in between frames to observe the sequence distinctly.

Pioneers in the industry, we offer ATTINY2313A-PU PIC Microcontroller, PIC16F882-I/SP PIC Microcontroller, PIC16F883-I/SP Micro Controller, PIC12F510-I/P PIC Microcontroller, PIC12F508-I/P PIC Microcontroller and Pic16F886-I/Sp Micro Controller from India.

The PIC16F882-I/SP is a 8-bit CMOS Flash-based Microcontroller. ... The PIC16F882 devices have two timers that offer necessary delays on power-up. One is the Oscillator Start-up Timer (OST), intended to keep the chip in reset until the crystal oscillator is stable.

RA6M4 Microcontroller Group Uses The High-Performance Arm® Cortex®-M33 Core With TrustZone. Built On A Highly-Efficient 40nm Process & Supported By Open, Flexible Ecosystem Concepts. Ethernet Controller. Dual-Bank Flash. Secure Functionality.

The PIC12F510-I/P is a baseline PIC12 family 8-bit powerful (200 nanosecond instruction execution) yet easy-to-program CMOS flash based Microcontroller packs powerful PIC®(RISC) architecture.

It is generally thought that PIC stands for Peripheral Interface Controller, although General Instruments" original acronym for the initial PIC1640 and PIC1650 devices was "Programmable Interface Controller". The acronym was quickly replaced with "Programmable Intelligent Computer".

The PIC16F882-I/SP is a 8-bit CMOS Flash-based Microcontroller. ... The PIC16F882 devices have two timers that offer necessary delays on power-up. One is the Oscillator Start-up Timer (OST), intended to keep the chip in reset until the crystal oscillator is stable.

With the PIC16F628A-I/P microcontroller from Microchip Technology, you can program a circuit to perform tasks that meet your desired specifications. This microcontroller has an operating temperature range of -40 °C to 85 °C. It has a maximum clock speed of 20 MHz. Its flash program memory is 3.5KB.