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设备上用了LP8556座恒流源驱动,发现EEPRom无法写入,掉电后配置丢失,具体操作步骤如下:
0x2c为从设备地址,即恒流源芯片地址
上电操作过程:
(1)开启恒流源控制电源12v
(2)设置0xa0寄存器为0x99
(3)设置0xa1寄存器为0x69
(4)设置0x16寄存器为0x0f
(5)设置0x72寄存器为0x80,0x72默认为0x0f,设置0x80后查看实际值为0x8f
(6)设置0xa2为0x00
(7)设置0x72寄存器为0x00,设置后查看0x72寄存器结果为0x0f
(8)下电后,从新上电,上述值全部恢复默认,设置的值并未生效
请帮忙看下哪个步骤有问题,或者要增加什么才能使配置信息能保存到eeprom中,谢谢!
HI
在论坛: https://e2echina.ti.com/support/power-management/f/power-management-forum/232845/lp8556-lp8556-eeprom 中回复即可。
我将关闭这个case。