Digilent, Inc.

PmodCLS Reference Manual

www.digilentinc.com

www.digilentinc.com

page 2 of 4

Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.

jumper is represented by 1 and a connected

jumper is represented by 0.

MD2, MD1, MD0

Protocol

Details

0,0,0

UART

2400 baud

0,0,1

UART

4800 baud

0,1,0

UART

9600 baud

0,1,1

UART

baud rate in

EEPROM

1,0,0

TWI

address: 0x48

1,0,1

TWI

address in

EEPROM

1,1,0

SPI

1,1,1

specified

in

EEPROM

specified in

EEPROM

Connector J1 is used for SPI communication.

Connector J2 can either be used for UART or

TWI communication. Connectors J4 and J5

can be used to daisy chain other TWI devices.

Power Supply Options

The module is rated for external power ranging

from 2.7 to 5.5 volts DC. Using voltage outside

this range could damage the PmodCLS and

connected devices. The PmodCLS can be

powered through the board’s 6-pin headers J1

or J2, or through connectors J6 or J7.

When the module is connected to another

Digilent microcontroller or FPGA board, that

board can power the PmodCLS through a

Pmod connector. The host board should be

jumpered to provide 3.3V on the VCC pin of

the connector being used. The module is then

powered by the host board’s power supply.

Instruction Set

The PmodCLS is capable of executing many

different instructions. Instructions are sent

using escape sequences. An escape sequence

begins with the ESC character (character code

0x1B or decimal 27), followed by the left

square bracket ‘[‘ , followed by 0 or more

parameters separated by semicolons ‘;’ and

ending with the command character.

Command characters are case sensitive.

Instruction

Result

<row>;<col>H

set cursor position to

<row>,<col>

s

save cursor position

u

restore saved cursor

position

j

clear display and home

cursor

<ps>K

erase within line

0 = current position to

end of line

1 = start of line to

current position

2 = entire line

<ps>N

erase field in current line

<ps> = number of chars

starting at current

position

<pn>@

scroll left <pn> columns

<pn>A

scroll right <pn>

columns

*

reset; equivalent to

cycling power of

PmodCLS

<ps>e

enable/disable display

0 = display off,

backlight off

1 = display on,

backlight off

2 = display off,

backlight on

3 = display on,

backlight on

<ps>h

set display mode

0 = wrap line at 16

characters

1 = wrap line at 40

characters

<ps>c

set cursor mode

0 = cursor off

1 = cursor on, blink off

2 = cursor on, blink on

<pn>a

save TWI address in

EEPROM to <pn>

<pn>b

save baud rate value in

EEPROM to <pn>

<pt>p

program character table

into LCD