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TM1628A Datasheet(PDF) 8 Page - Shenzhen Tianwei Electronics Co., Ltd

Part # TM1628A
Description  LED drive control dedicated circuit
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Manufacturer  TITANMEC [Shenzhen Tianwei Electronics Co., Ltd]
Direct Link  http://www.titanmec.com/
Logo TITANMEC - Shenzhen Tianwei Electronics Co., Ltd

TM1628A Datasheet(HTML) 8 Page - Shenzhen Tianwei Electronics Co., Ltd

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LED 驱动控制专用电路
TM1628A
©Titan Micro Electronics
www.titanmec.com
- 8 -
V1.1
(2)按键复用: 复合按键的问题:SEG1/KS1-SEG10/KS10是显示和按键扫描复用的。以图(12)为例子,
显示需要D1亮,D2灭,需要让SEG1为“0”,SEG2为“1”状态,如果S1,S2同时被按下,相当于SEG1,SEG2被短路,这
时D1,D2都被点亮。
S1
S2
D1
D2
GRID1
SGE1/ KS1
SGE2/ KS2
K1
图(12)
解决方案:
1、在硬件上,可以将需要同时按下的键设置在不同的K线上面如图(13)所示,
D1
D2
S2
S1
SGE1/ KS1
GRID1
GRID2
K1
K2
图(13)
2、串联二极管如图(14)所示。
S1
S2
D1
D2
GRID1
SGE1/ KS1
SGE2/ KS2
K1
图(14)
▲注意: 建议使用同一个KS不同的K键作为复合按键。


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