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TPS6594-Q1: PMIC state switching question

yao.xue
Intellectual 700 points
Part Number: TPS6594-Q1

问题1：ENABLE管脚拉高之后，状态机的是否可以到MCU_ONLY模式?
Question1:After the ENABLE pin is pulled high, can the state machine enter the MCU_ONLY mode?
问题2：进入standby状态后，GPIO唤醒管脚（GPIO4连接到WAKEUP域WKUP_GPIO0_49），怎么操作该功能唤醒？
standby模式下，MCU关闭，我们能否操作通过WKUP_GPIO0_49唤醒？
Question 2: After entering the standby state, the MCU is off,  the GPIO wake-up pin (GPIO4 is connected to the  WKUP_GPIO0_49 of WAKEUP domain),  How  Can we wake it up through the pin WKUP_GPIO0_49 of TDA4 ?

问题3：standby状态返回是否只能为active?

Question 3: Does the returned value of standby mode can only be active ?

从手册中看到LP_WKUP1可以唤醒返回到ACTIVE状态，LP_WKUP2可以唤醒到返回MCU_ONLY状态，若设计PMIC只有GPIO4支持唤醒，除定时唤醒，还有其他方式可以从standby返回到MCU_ONLY状态？
From the datasheet(8.4.1.2.4.5), we can see that LP_WKUP1 can wake up and return to the ACTIVE state, and LP_WKUP2 can wake up and return to the MCU_ONLY state. If the PMIC is designed and only GPIO4 supports wake-up, in addition to scheduled wake-up, there are other ways to return to the MCU_ONLY state from standby.
从参考资料《Powering Jacinto TM J7 SoC Family For Isolated Power Groups With TPS6594133A-Q1 PMIC and Dual HCPS Converters》文档中看到描述STANDBY返回的唯一目标状态为ACTIVE?

From the 《Powering Jacinto TM J7 SoC Family For Isolated Power Groups With TPS6594133A-Q1 PMIC and Dual HCPS Converters》(6.3), we can see that The ACTIVE state is the only destination state available that the STANDBY state returns to?
问题4：通过各种触发源切换到不同的状态机后，可通过什么方式确认切换后的状态机是否为设定的状态？
查看了相关的寄存器，没看到有关当前状态相关的寄存器可以读取。
Question 4: After switching to the set state machine,how can we ensure the state machine is successful? Is there a register that can provide feedback?

  • 0
    TI__Mastermind 23685 points
    yao.xue said:
    Question 1: After the ENABLE pin is pulled high, can the state machine enter the MCU_ONLY mode?

    If a fault happens on a rail in the SOC rail power group during start up, the PMIC will head to MCU_ONLY mode. After the first power up, the PMIC can be told go to go to MCU_ONLY mode using the nSLEEP bits. 

    If you want to the PMIC head to MCU_only mode when it leaves the STANDBY state on the next ENABLE rise, set the STARTUP_DEST=0x2.

    yao.xue said:
    Question 2: After entering the standby state, the GPIO wake-up pin (GPIO4 is connected to WAKEUP domain WKUP_GPIO0_49). How to operate this function to wake up?

    Follow these steps to wake into MCU Only mode using GPIO4:

    1. Mask the nSLEEP bit controls by setting the NSLEEPx_MASK bits in register 0x7D.
    2. Configure GPIO4 to be LP_WKUP1 to head to ACTIVE state or LP_WKUP2 for MCU Only state.
    3. Unmask the GPIO4 rise interrupt
    4. Write 1 to I2C_0 Trigger -> Sends PMIC to standby
    5. Raise GPIO4 -> PMIC will head to mode determined by step 2
    yao.xue said:
    See from the reference document "Powering Jacinto TM J7 SoC Family For Isolated Power Groups With TPS6594133A-Q1 PMIC and Dual HCPS Converters" Description The only target status returned by STANDBY is ACTIVE?

    In the example provided in the user guide, GPIO4 is set as WKUP1. GPIO4 can be configured as WKUP2/LP_WKUP2 after boot. The PMIC will enter MCU Only mode  in this case.

    yao.xue said:
    Question 4: After switching to the set state machine,how can we ensure the state machine is successful? Is there a register that can provide feedback?

    For TPS6594133A, the easiest thing to do is read the state of nRSTOUT and nRSTOUT_SOC. This can be found in register 0x81:

    If both high, then PMIC is in ACTIVE state. If both low, PMIC is in deep sleep / standby / or retention modes. If nRSTOUT = 1 and nRSTOUT_SOC=0, then PMIC is in MCU Only mode.