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参数资料
| 型号： | LK202-25-FW-E |
| 厂商： | Matrix Orbital |
| 文件页数： | 10/42页 |
| 文件大小： | 2198K |
| 描述： | LCD CHAR DISP 20X2 I2C/RS232/TTL |
| 标准包装： | 1 |
| 系列： | LK202-25 |
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14
5.3
Communication
When communication of either text or commands is interrupted, try the steps below.
?
First, check the communication cable for continuity. If you don't have an ohm meter, try using a
different communication cable. If you are using a PC try using a different Com/USB Port.
?
Next, please ensure that the display module is set to communicate on the protocol that you are
using, by checking the Protocol Select Jumpers.
?
In serial and USB protocols, ensure that the host system and display module are both
communicating on the same baud rate. The default rate for the display module is 19200 bps.
?
Match Rx from your display to the transmitting pin from your host and the
Tx pin to the
receiving pin.
?
If you are communicating to the display via I2C*
please ensure that the data is being sent to the
correct address. The default slave address for the display module is 80.
?
In I2C mode, connect Rx to the clock line of your controller and Tx to the data output.
?
Unlock the display. See the Set and Save Data Lock command for more info.
?
Finally, you may reset the display to its default settings using the Manual Override
procedure
outlined below.
*Note:
I2C communication will always require pull up resistors on SCL and SDA of one to ten kilohms.
5.4
Manual Override
Should the settings of your display become altered in a way that dramatically impacts usability, the
default settings can be temporarily restored. To override the display, please follow the steps below.
1.
Disconnect power from your display.
2.
Place a jumper on the middle two keypad pins, R5 and C1.
3.
Reconnect power to your unit, and wait for the start screen before removing the jumper.
4.
Settings will be temporarily**
overridden to the defaults listed in the Manual Override Settings
table. At this point any important settings, such as contrast, backlight, or baud rate, should not only
be set but saved so they remain when the override is removed.
Parameter
Value
Backlight
255
Contrast
128
Baud Rate
19200
I2C Address
80
Table 11: Manual Override Settings
**Note:
The display module will revert back to the old settings once turned off,
unless desired settings are saved.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LK202-25-FW-V | 功能描述:LCD字符显示模块与配件 20x2 Wht Txt Blk B/G Ext. Volt 25 key 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 |
| LK202-25-FW-V-E | 制造商:Matrix Orbital 功能描述:20x2 Wht Txt, Blk BG Wide Volt, Ext Temp |
| LK202-25-FY | 功能描述:LCD字符显示模块与配件 Black Background Yellow 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 |
| LK202-25-GW | 功能描述:LCD字符显示模块与配件 White Background Blue 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 |
| LK202-25-GW-E | 功能描述:LCD字符显示模块与配件 20x2 L. Blu Txt G/Wht B/G Ext. Temp 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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