30058 Parallax Inc, 30058 Datasheet - Page 23

• Manufacturer Part Number: 30058
• Description: SER LCD 4X20 W/KEYBRD INTERFACE
• Manufacturer: Parallax Inc

Specifications of 30058

• Interface: Serial
• Display Type: LCD - Monochrome
• Display Mode: Reflective
• Viewing Area: 82.20mm L x 18.20mm W
• Backlight: LED - White
• Character Count X Line: 20 x 4
• Module Size (w X H X T): 98 mm x 60 mm x 27.5 mm
• Voltage Rating: 4.75 V to 5.25 V
• Operating Temperature Range: 0 C to + 50 C
• For Use With: 27963 - SOLUTIONS CUBED: MEMKEY
• Dot Size: -
• Dot Pitch: -
• Dot Pixels: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q2089249

Matrix Orbital
Syntax
Parameters
Description
Remembered
Examples
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 mod-
ules baud generator. Use the formula, speed
culate 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.
Always
Crystal Speed
NOTES
Hexadecimal
Decimal
Parameter
speed
speed
LSB = 0x4A (rounded)
MSB = 0x00
Inteded Baud Rate: 13,500 baud
Results from the formula are rounded down to the nearest whole number (73.07 =
73).
This formula becomes less acurate as baud rates increase, due to rounding.
Place the speed result backwards into the formula to receive the actual baud rate.
(Baud
The actual baud rate must be within 3% of the intended baud rate for the device to
communicate.
8 000 000
8 73 1
speed
8 DesiredBaud
CrystalSpeed
8 Mhz
8 speed 1
74 07
13,675
crystalspeed
0xFE 0xA4 [speed]
254 164 [speed]
LK204-25
Length
2
1
)
Percent Difference: 1.8%
Description
Inputed LSB MSB from baud rate
formula (12-2047).
1
speed
Actual Baud Rate:
speed
8 DesiredBaud
CrystalSpeed
8 000 000
8 13 500
73 07
1
1 to cal-
19