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MMPF0200Z 数据表(PDF) 31 Page - NXP Semiconductors |
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MMPF0200Z 数据表(HTML) 31 Page - NXP Semiconductors |
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31 / 118 page  Analog Integrated Circuit Device Data Freescale Semiconductor 31 PF0200Z Functional Block Requirements and Behaviors Power Generation 6.4.2 State Machine Flow Summary Table 24 provides a summary matrix of the PF0200Z flow diagram to show the conditions needed to transition from one state to another. 6.4.2.1 Turn On Events From OFF and Sleep modes, the PMIC is powered on by a turn-on event. The type of Turn-on event depends on the configuration of PWRON. PWRON may be configured as an active high when PWRON_CFG = 0, or as the input of a mechanical switch when PWRON_CFG = 1. VIN must be greater than UVDET for the PMIC to turn-on. When PWRON is configured as an active high and PWRON is high (pulled up to VSNVS) before VIN is valid, a VIN transition from 0.0 V to a voltage greater than UVDET is also a Turn-on event. See the State diagram, Figure 8, and the Table 24 for more details. Any regulator enabled in the Sleep mode will remain enabled when transitioning from Sleep to ON, i.e., the regulator will not be turned off and then on again to match the start- up sequence. The following is a more detailed description of the PWRON configurations: • If PWRON_CFG = 0, the PWRON signal is high and VIN > UVDET, the PMIC will turn on; the interrupt and sense bits, PWRONI and PWRONS respectively, will be set. • If PWRON_CFG = 1, VIN > UVDET and PWRON transitions from high to low, the PMIC will turn on; the interrupt and sense bits, PWRONI and PWRONS respectively, will be set. Table 24. State Machine Flow Summary STATE Next State OFF Coin cell Sleep Standby ON OFF XVIN < UVDET X X PWRON_CFG = 0 PWRON = 1 & VIN > UVDET or PWRON_CFG = 1 PWRON = 0 < 4.0 s & VIN > UNDET Coin cell VIN > UVDET X X X X Sleep Thermal Shutdown VIN < UVDET X X PWRON_CFG = 0 PWRON = 1 & VIN > UVDET or PWRON_CFG = 1 PWRON = 0 < 4.0 s & VIN > UNDET PWRON_CFG = 1 PWRON = 0 ≥ 4.0 s Any SWxOMODE = 1 & PWRONRSTEN = 1 Standby Thermal Shutdown VIN < UVDET PWRON_CFG = 0 PWRON = 0 Any SWxOMODE = 1 or PWRON_CFG = 1 PWRON = 0 ≥ 4.0 s Any SWxOMODE = 1 & PWRONRSTEN = 1 X Standby de-asserted PWRON_CFG = 0 PWRON = 0 All SWxOMODE = 0 or PWRON_CFG = 1 PWRON = 0 ≥ 4.0 s All SWxOMODE = 0 & PWRONRSTEN = 1 ON Thermal Shutdown VIN < UVDET PWRON_CFG = 0 PWRON = 0 Any SWxOMODE = 1 or PWRON_CFG = 1 PWRON = 0 ≥ 4.0 s Any SWxOMODE = 1 & PWRONRSTEN = 1 Standby asserted X PWRON_CFG = 0 PWRON = 0 All SWxOMODE = 0 or PWRON_CFG = 1 PWRON = 0 ≥ 4.0 s All SWxOMODE = 0 & PWRONRSTEN = 1 |
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