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参数资料
型号： LCD2041-V
厂商： Matrix Orbital
文件页数： 14/55页
文件大小： 1536K
描述： LDC CHAR 9 TO 15VDC 20X4 Y/GBK
产品变化通告： Backlight Change 02/Mar/2010
Wide Voltage/Temperature Change 03/Jun/2011
标准包装： 1
系列： LCD2041
显示器类型： LCD - 单色
显示模式： 反射
数字/字母数： 80
外形L x W x H： 98.00mm x 60.00mm x 27.50mm
可视范围： 76.00mm L x 25.20mm W
背光： LED - 黄/绿
显示格式： 20 x 4
字符尺寸： 4.75mm H x 2.95mm W
字符格式： *
电源电压： 9 V ~ 15 V
接口： I²C，RS232，TTL
工作温度： 0°C ~ 50°C
其它名称： Q4126558
that the transmission is over.
The LCD2041 has some speed limitations, especially when run
in I2C mode. Here are some considera-
tions when writing I2C code:
* to be able to read the replies of query commands (eg. cmds 54,
55) the following command must be
sent (only needs to be sent once, so this can be done somewhere
in init): 254 / 160 / 0 this command puts
the reply data in the I2C output buffer instead of the RS232 output buffer. Please note that due to a 16 byte
output buffer, query commands that reply with more than 16 bytes cannot be read (eg cmd Get FileSystem
Directory)
* 3ms delay between the read commands
* 625us delay in between data bytes within a transaction is necessary
* 375us between transactions is necessary
NOTE
These delays are consrevative, and may be decreased based on
performance
4.1.2 I2C Transaction Example
The typical I2C transaction contains four parts: the start sequence, addressing, information, and stop
sequence. To begin a transaction the data line, SDA, must toggle from high to low while the clock line, SCL,
is high. Next, the display must be addressed using a one byte hexadecimal value, the default to write to the
unit is 0x50, while read is 0x51. Then information can be sent
to the unit; even when reading, a command
must ?rst be sent to let the unit know what type of information
it is required to return. After each bit is sent,
the display will issue an ACK or NACK as described above. Finally, when communication is complete, the
transaction is ended by toggling the data line from low to high while the clock line is high. An example of
the use of this algorithm to write a simple “HELLO” message ca
n be seen in 3.
Table 3: I2C Transaction Algorithm
START
Toggle SDA high to low
Address
0x50
Information
0x48 0x45 0x4C 0x4C 0x4F
STOP
Toggle SDA low to high
4.1.3 Serial Communication
In addition to being able to communicate via I2C the LCD2041 communicates natively through the
RS-232 protocol at at a default baud rate of 19,200 bps and is capable of standard baud rates from 9600
to 115,200 bps. Furthermore the LCD2041 is also capable of reproducing any non-standard baud rate in
between using values entered into our baud rate generation algorithm and set through command 164 (0xA4).
The display module communicates at standard voltage levels
of -30V to +30V or at TTL levels of 0 to +5V
by setting the
Protocol Select Jumpers
to TTL.
Matrix Orbital LCD2041
17
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相关代理商/技术参数
参数描述
LCD2041-V-E 制造商:Matrix Orbital 功能描述:20x4 Blk Txt, Y/G BG Low Volt, Ext Temp
LCD2041-VPT 功能描述:LCD字符显示模块与配件 20x4 Blk Txt Y/G B/G Voltage Regulator RoHS:否 制造商:Lumex 显示模式:Transflective 字符计数 x 行:16 x 2 特点: 流体类型:STN 接口: 背景色: 工作温度范围:- 20 C to + 70 C 封装:Bulk
LCD2041-VPT-E 制造商:Matrix Orbital 功能描述:20x4 Blk Txt, Y/G BG Wide Volt, Ext Temp
LCD2041-WB 功能描述:LCD字符显示模块与配件 Blue Background White Text RoHS:否 制造商:Lumex 显示模式:Transflective 字符计数 x 行:16 x 2 特点: 流体类型:STN 接口: 背景色: 工作温度范围:- 20 C to + 70 C 封装:Bulk
LCD2041-WB-E 功能描述:LCD字符显示模块与配件 20x4 Wht Txt Blu B/G Ext. Temp No Key LCD RoHS:否 制造商:Lumex 显示模式:Transflective 字符计数 x 行:16 x 2 特点: 流体类型:STN 接口: 背景色: 工作温度范围:- 20 C to + 70 C 封装:Bulk
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