SLAU367P October 2012 – April 2020 MSP430FR5041 , MSP430FR5043 , MSP430FR50431 , MSP430FR5847 , MSP430FR58471 , MSP430FR5848 , MSP430FR5849 , MSP430FR5857 , MSP430FR5858 , MSP430FR5859 , MSP430FR5867 , MSP430FR58671 , MSP430FR5868 , MSP430FR5869 , MSP430FR5870 , MSP430FR5872 , MSP430FR58721 , MSP430FR5887 , MSP430FR5888 , MSP430FR5889 , MSP430FR58891 , MSP430FR5922 , MSP430FR59221 , MSP430FR5947 , MSP430FR59471 , MSP430FR5948 , MSP430FR5949 , MSP430FR5957 , MSP430FR5958 , MSP430FR5959 , MSP430FR5962 , MSP430FR5964 , MSP430FR5967 , MSP430FR5968 , MSP430FR5969 , MSP430FR5969-SP , MSP430FR59691 , MSP430FR5970 , MSP430FR5972 , MSP430FR59721 , MSP430FR5986 , MSP430FR5987 , MSP430FR5988 , MSP430FR5989 , MSP430FR5989-EP , MSP430FR59891 , MSP430FR5992 , MSP430FR5994 , MSP430FR59941 , MSP430FR6005 , MSP430FR6007 , MSP430FR6035 , MSP430FR6037 , MSP430FR60371 , MSP430FR6041 , MSP430FR6043 , MSP430FR60431 , MSP430FR6045 , MSP430FR6047 , MSP430FR60471 , MSP430FR6820 , MSP430FR6822 , MSP430FR68221 , MSP430FR6870 , MSP430FR6872 , MSP430FR68721 , MSP430FR6877 , MSP430FR6879 , MSP430FR68791 , MSP430FR6887 , MSP430FR6888 , MSP430FR6889 , MSP430FR68891 , MSP430FR6920 , MSP430FR6922 , MSP430FR69221 , MSP430FR6927 , MSP430FR69271 , MSP430FR6928 , MSP430FR6970 , MSP430FR6972 , MSP430FR69721 , MSP430FR6977 , MSP430FR6979 , MSP430FR69791 , MSP430FR6987 , MSP430FR6988 , MSP430FR6989 , MSP430FR69891
If UUPSCTL.ASQEN = 1, the PSQ block automatically sends the PSQ_START signal to the ASQ when the USS module is fully powered up. The ASQ starts new measurement sequences upon receiving the PSQ_START signal if SAPHASCTL0.TRIGSEL = 1. In this case, the full measurement sequence can be performed without any CPU intervention, and the USS_PWRREQ is the only trigger signal the USS module needs externally. The PSQ and ASQ must be configured independently (see Figure 19-4). The ASQ can be triggered by user software by writing SAPHASQTRIG.ASQTRIG = 1 when SAPHASCTL0.TRIGSEL = 0.
Figure 19-4 shows the interface signals between the PSQ and the ASQ (see Section 21 for details). If UUPSCTL.ASQEN = 1, the PSQ block sends the PSQ_START signal to the ASQ when the USS module reaches READY state from OFF state. Then, the ASQ starts new measurement sequences upon receiving the PSQ_START signal if SAPHASCTL0.TRIGSEL = 1. In this case, the full measurement sequences can be performed without any CPU intervention. The USS_PWRREQ is the only trigger signal the USS needs to take externally. The PSQ and ASQ must be configured independently (see Figure 19-4). The ASQ can be triggered manually by user software by writing SAPHASQTRIG.ASQTRIG = 1 when SAPHASCTL0.TRIGSEL = 0.
| ASQ Auto Trigger Mode | PSQ Configuration | ASQ Configuration | How to Trigger ASQ |
|---|---|---|---|
| Yes | UUPSCTL.ASQEN = 1 | SAPHASCTL0.TRIGSEL = 1 | The PSQ sends a trigger signal (PSQ_START) to the ASQ when the USS gets to READY state |
| No | UUPSCTL.ASQEN = 0 | SAPHASCTL0.TRIGSEL = 1 | This configuration is not supported |
| No | UUPSCTL.ASQEN = 1 | SAPHASCTL0.TRIGSEL = 0 | The PSQ_START signal generated by the PSQ is ignored. The ASQ is triggered by writing 1 to SAPHASQTRIG.ASQTRIG. |
| No | UUPSCTL.ASQEN = 0 | SAPHASCTL0.TRIGSEL = 0 | The ASQ is triggered by writing 1 to SAPHASQTRIG.ASQTRIG. |