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PCA9450 データシート(PDF) 16 Page - NXP Semiconductors |
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PCA9450 データシート(HTML) 16 Page - NXP Semiconductors |
16 / 96 page NXP Semiconductors PCA9450 Power management IC for i.MX 8M application processor family PCA9450 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2019. All rights reserved. Product data sheet Rev. 1.0 — 19 November 2019 16 / 96 Any POK of voltage regulators doesn’t come up within tFLT_SD_PU after regulator is enabled during power up sequence. It stops power-up sequence and then moves to FAULT_SD where all regulators are turned off. It stays at FAULT_SD for tFLT_SD_STAY and transitions to READY state. 3. Voltage regulator fault in STANDBY and RUN MODE: Move to FAULT_SD mode in tFLT_SD_WAIT after Fault is detected. Transition to SNVS mode or READY mode from FAULT_SD mode when fault is removed. During RUN and STANDBY mode, VR Fault status bit in VRFLT1_STS and VRFLT2_STS registers is latched to “1” when corresponding regulator voltage falls below POK threshold for tDEB_POKB, or POK doesn’t go high within tFLT_POK_MSK after regulator is enabled. If the fault status bit is masked in VRFLT1_MASK and VRFLT2_MASK registers, it doesn’t enter FAULT_SD mode. Instead, PCA9450 stays at current mode. If the fault register bit is unmasked, it starts tFLT_SD_WAIT timer. Application processor can determine to enter FAULT_SD mode or not, by masking the VR Fault status bit in VRFLTx_MASK registers before the timer expires. PCA9450 enters FAULT_SD mode when the timer expires. PCA9450 stays in FAULT_SD mode for tFLT_SD_STAY. aaa-035711 RUN/STANDBY Mode FAULT EVENT INT AP receives INT Unmask fault register bit or Clear the status bit when fault is cleared RUN/STANDBY RUN/STANDBY Mode FAULT EVENT INT AP receives INT FAULT_SD tFLT_SD_WAIT starts tFLT_SD_WAIT starts AP doesn't take an action until timer is expired Figure 10. PCA9450 Fault event PCA9450 moves to READY mode after FAULT_SD mode if the regulator fault is caused by LDO1 or LDO2. Otherwise, it moves to SNVS mode after FAULT_SD. If either LDO1 or LDO2 has fault in SNVS mode, then it enters FAULT_SD mode regardless of VRFLT1 Mask bit. PCA9450 doesn’t enter FAULT_SD mode from load switch overcurrent fault. |
同様の部品番号 - PCA9450 |
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同様の説明 - PCA9450 |
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