Matrix-orbital VFD2041 User Manual download pdf (Page 25)

Description This command sets the RS-232 port to the speciﬁed [speed]. The change

takes place immediately. [speed] is a single byte specifying the desired

port speed. Valid speeds are shown in the table below. The display

module can be manually reset to 19,200 baud in the event of an error

during transmission, including transmitting a value not listed below, by

setting the manual override jumper during power up. However, it should

be noted that this command will be ignored until the manual override

jumper is removed again.

Hex Value Baud Rate

53 1200

29 2400

CF 4800

67 9600

33 19200

22 28800

19 38400

10 57600

8 115200

NOTE This command is not available in I

C mode.

Remembered Always

Default 19,200 bps

4.4 Setting a Non-Standard Baud Rate

Syntax

Hexadecimal 0xFE 0xA4 [speed]

Decimal 254 164 [speed]

Parameters

Parameter Length Description

speed 2 Inputed LSB MSB from baud rate

formula (12-2047).

Description This command sets the RS-232 port to a non-standard baud rate. The

command accepts a two byte parameter that goes directly into the

modules baud generator. Use the formula, speed =

CrystalSpeed

8×DesiredBaud

− 1 to

calculate the [speed] for any baud rate setting. The speed can be

anywhere from 12 to 2047 which corresponds to a baud range of 977 to

153,800 baud. Setting the baud rate out of this range could cause the

display to stop working properly and require the Manual Override

jumper to be set.

Remembered Always

Matrix Orbital VFD2041 21

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Matrix-orbital VFD2041 User Manual Page 25

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