100 points asked 12864 LCD how to see is not broken, there is no negative pressure
Author:black humour Time:2021-07-20 09:19 Browse(369)
1. Generally speaking, there is negative pressure output inside. If the vee pin is directly connected to the 8-pin or 14 pin chip of a certain chip of the LCD module, the module has negative pressure output of Vee. If not, you have to connect yourself.
1. Generally speaking, there is negative pressure output inside. If the vee pin is directly connected to the 8-pin or 14 pin chip of a certain chip of the LCD module, the module has negative pressure output of Vee. If not, you have to connect yourself.. 2. When RST=h, KS0108B works normally, and when RST=L, KS0108B enters reset state. However, the voltage of Vee in these two states should be the same.. 3. If D7 bit of read state operation is not zero, it is estimated that the LCD module has been damaged. The specific test method is very simple: without MCU program, directly connect rs to ground, R / w to 5V, e to 5V, CS1 to 5V, CS2 to ground. At this time, test D7 with multimeter. If D7=0, chip 1 is normal, if D7=5V, chip 1 is damaged. In the same way, directly connect rs to ground, R / w to 5V, e to 5V, CS1 to ground, CS2 to 5V. At this time, use a multimeter to test D7. If D7=0, chip 2 is normal. If D7=5V, chip 2 is damaged... For reference to 12864, see http://www.sunman.cn/chinese/product/smg12864a.asp . Ask the same question....

100 points asked 12864 LCD how to see is not broken, there is no negative pressure

Related topics