Other Parts Discussed in Thread: TPS65185
通过获取寄存器0x08h (INT2) 的值, 值为0x08, 数据手册里面标明问题是:
| 1 – under-voltage on VEE charge pump detected |
这样的话,如何修改能够使VEE输出正常呢? 能否有办法修改VEE的输出?
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Other Parts Discussed in Thread: TPS65185
通过获取寄存器0x08h (INT2) 的值, 值为0x08, 数据手册里面标明问题是:
| 1 – under-voltage on VEE charge pump detected |
这样的话,如何修改能够使VEE输出正常呢? 能否有办法修改VEE的输出?
你好,我阅读了TPS65185的芯片手册,发现:
WAKE-UP AND POWER UP SEQUENCING
The power-up/down order and timing is defined by user register settings. The default settings support the E Ink®
Vizplex™ panel and typically do not need to be changed.
这一句话,也就是我只要按照默认方式,不需要操作I2C,就能驱动eink屏显示是吧? 但是目前现象是不能驱动,是需要找TI还是找EINK来帮助解决这个问题
谢谢,
This may be a layout related issue instead of a software issue, and can be confirmed by probing these failing rails with an oscilloscope during the boot sequence.
The charge pumps and LDOs are supplied by the boost regulators, and If these components are not adequately bypassed with capacitors they could have issues starting. A common issue is omitting capacitors on the VDDH_D and VEE_D rails.
这是国外论坛给的回复,不太懂他指的除去的电容是指C71还是C73?