Tool/software:
Please help to answer the questions from customer below:
Background:
Regarding the wake-up topology for our robot BMS, which we previously discussed, I still have some questions:
1. AFE_3.3V Wake-Up: This is powered by the REG1 output of the AFE.
2. Power_EN: Maintains wake-up status after the MCU is powered on.
3. RTC_WK: Used for periodic wake-up by the RTC when the AFE is in sleep mode and the MCU is powered down.
4. Key_WK: External button wake-up.
Given this design, we have included a redundant branch for external button wake-up (low-level trigger) to handle cases where the AFE may fail or be damaged, preventing wake-up through the button or charging. This branch is connected to both the TS2 pin for AFE wake-up and the Key_WK line.
Based on this background, I have the following questions:
1. Is the TS2 wake-up connection mandatory? (My understanding is that it must be connected; otherwise, the AFE can only be woken up from the shutdown state via LD charging, correct?)
2. If a TS2 connection is required, can it be modified so that the MCU, upon waking up, outputs a low-level signal to TS2 for wake-up purposes?
3. If both the AFE and MCU wake-up are connected, there might be timing differences during wake-up (e.g., if the MCU wakes up first). What impact could this have?
