After that the LCD decodes the data for generating the 5x7 pattern and finally displays on the LCD. If the RS signal is HIGH then the LCD interprets the 8-bit info as data and copies it to data register. If the RS signal is LOW then the LCD interprets the 8-bit info as Command and writes it Command register and performs the action as per the command. This signal is used to differentiate the data/cmd received by the LCD. Command can be issued to LCD by writing it to Command register of LCD. Any data that needs to be displayed on the LCD has to be written to the data register of LCD. Register Select(RS): The LCD has two register namely a Data register and Command register. It also provides the provision to send the data/cmd in chunks of 4-bit, which is used when there are limited number of GPIO lines on the microcontroller. 3 Reasons Why the Micron Technology, Inc.Let us look at a pin diagram of a commercially available LCD like JHD162 which uses a HD44780 controller and then describe its operation.Īpart from the voltage supply connections the important pins from the programming perspective are the data lines(8-bit Data bus), Register select, Read/Write and Enable pin.ĭata Bus: As shown in the above figure and table, an alphanumeric LCD has an 8-bit data bus referenced as D0-D7.Īs it is an 8-bit data bus, we can send the data/cmd to LCD in bytes.Introducing the Intel D2000 Quark Microcontroller Developer Kit.Other data sheets are available within the file: LPC2141, LPC2141FBD64, LPC2142, LPC2142FBD64, LPC2144 Related articles across the web On-chip RealMonitor software and high-speed tracing of instruction execution. EmbeddedICE RT and Embedded Trace interfaces offer real-time debugging with the
Single flash sector or full chip erase in 400 ms and programming of 256 B in 1 ms.Ĥ. In-System Programming/In-Application Programming (ISP/IAP) via on-chip boot loader software. 128-bit wide interface/accelerator enables high-speed 60 MHz operation.ģ. 8 kB to 40 kB of on-chip static RAM and 32 kB to 512 kB of on-chip flash memory. 16-bit/32-bit ARM7TDMI-S microcontroller in a tiny LQFP64 package.Ģ. For critical code size applications, the alternative 16-bit Thumb mode reduces code by more than 30 % with minimal performance penalty.ġ. A 128-bit wide memory interface and a unique accelerator architecture enable 32-bit code execution at the maximum clock rate. The LPC2141 / LPC2142 / LPC2144 / LPC2146 / LPC2148 microcontrollers are based on a 16-bit/32-bit ARM7TDMI-S CPU with real-time emulation and embedded trace support, that combine the microcontroller with embedded high-speed flash memory ranging from 32 kB to 512 kB.
0 kommentar(er)
