pmodcls_rm (1162580)

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1300 Henley CourtPullman, WA 99163509.334.6306www.digilentinc.comPmodCLS™ Reference ManualRevised April 8, 2016This manual applies to the PmodCLS rev. D-EOverviewThe Digilent PmodCLS is a 16x2 character LCD module driven by an Atmel® ATmega48 microcontroller.Features include:16×2 liquid crystal character displayWide range of instruction functionsUp to 32 user definable charactersMultiple communication options includingUART, SPI, and I²CSmall PCB size for flexible designs 1.8“ ×3.8” (4.6 cm × 9.7 cm)Two 1×6-pin Pmod ports with SPI and UARTinterfacesLibrary and example code available inresource centerThe PmodCLS.1Functional DescriptionThe PmodCLS module can be used to display important information during program development or as a userinterface after the project has been completed.

The module is ideally suited for microcontroller boards but canalso be used in projects using a FPGA board.The module is capable of executing a variety of instructions such as erasing specific characters, setting differentdisplay modes, scrolling, and displaying user-defined characters. These instructions are specified using escapesequences to send commands to the board’s embedded Atmel ATmega48 microcontroller. The display on themodule is driven by this AVR and controls all of the features of the board.2Interfacing with the PmodThe PmodCLS can communicate with the host board through the SPI, I 2C, and UART ports.DOC#: 502-092Copyright Digilent, Inc.

All rights reserved.Other product and company names mentioned may be trademarks of their respective owners.Page 1 of 3PmodCLS™ Reference ManualThrough these protocol standards, users are able to set the cursor location and send other instructions by sendingescape sequences. And escape sequence is specified by first sending the escape character (0x1B) followed by a leftsquare bracket '[' (0x5B), and then one or more numeric parameters followed by the command character for thespecific command.

Feel free to use our provided example code.Header J1Pin123456SignalSSMOSIMISOSCKGNDVCCHeader J2DescriptionSlave SelectMaster-Out-Slave-InMaster-In-Slave-OutSerial ClockPower Supply GroundPositive Power Supply (3.3V)Pin123456Table 1. J1 pinout description table.SignalSCLSDATXDRXDGNDVCCDescriptionSerial ClockSerial DataTransmit DataReceive DataPower Supply GroundPositive Power Supply (3.3V)Table 2. J2 pinout description table.Figure 1. PmodCLS block diagram.2.1Communication Protocol SelectionYou can set the board's communication method by setting the mode jumpers MD0, MD1, and MD2 on the board.Possible mode jumper configurations are listed in Table 3 below.

For rev. D boards, a missing jumper isrepresented by a '0' and a connected jumper is represented by '1'. For rev. E boards, a missing jumper isrepresented by a '1' and a connected jumper is represented by a '0'.Copyright Digilent, Inc. All rights reserved.Other product and company names mentioned may be trademarks of their respective owners.Page 2 of 3PmodCLS™ Reference ManualMD2, MD1, MD00,0,00,0,10,1,00,1,11,0,01,0,11,1,01,1,1ProtocolUARTUARTUARTUARTTWITWISPISpecified in EEPROMDetails2400 baud4800 baud9600 baudBaud rate in EEPROMAddress: 0x48Address in EEPROMSpecified in EEPROMTable 3.

Mode jumper configurations.Any external power applied to the PmodCLS must be within 2.7V and 5.5V; if you are powering the Pmod from itsVCC pin, you must operate the Pmod at 3.3V in order for the on-board step-up switching regulator to workcorrectly.3Physical DimensionsThe pins on the pin header are spaced 100 mil apart. The PCB is 1.8 inches long on the sides parallel to the pins onthe pin header and 3.8 inches long on the sides perpendicular to the pin header.Copyright Digilent, Inc.

All rights reserved.Other product and company names mentioned may be trademarks of their respective owners.Page 3 of 3.

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