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SWCS049D 数据表(PDF) 38 Page - Texas Instruments |
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SWCS049D 数据表(HTML) 38 Page - Texas Instruments |
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38 / 144 page  PWRON VIO INT1 NRESPWRON PWRHOLD PWRON_LP_IT=1 PWRON_IT=1 Switch-off sequence tdPWRONLPTO tdPWRONLP tdbPWRONF SWCS049-006 PWRON_IT=1 PWRON VIO INT1 1.8 V NRESPWRON Interrupt acknowledge PWRHOLD PWRON_IT=1 CLK32KOUT Interrupt acknowledge Switch-off sequence t tdbPWRONF tdSONT tdbPWRONF tdONPWHOLD Switch On sequence SWCS049-005 PWRON_IT=1 dbPWRHOLDF Internal pulse tdOINT1 38 TPS65911 SWCS049S – JUNE 2010 – REVISED AUGUST 2018 www.ti.com Submit Documentation Feedback Product Folder Links: TPS65911 Specifications Copyright © 2010–2018, Texas Instruments Incorporated Table 5-3. Switching Characteristics for Boot Sequence Example (continued) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tpd1b NRESPWON falling edge to CLK32KOUT low delay 3 × tCK32k = 92 µs tpd2 PWRHOLD falling edge to supplies and reference disable delay 5 × tCK32k = 154 µs 5.21.3 Power Control Timing 5.21.3.1 Device State Control Through PWRON Signal Figure 5-2 shows the device state control through PWRON signal. A. The DEV_ON or AUTODEV_ON control bits can be used instead of the PWRHOLD signal to maintain supplies on after a switch-on sequence. B. The internal POWER ON enable condition pulse, tdOINT1, keeps device active until a PWRHOLD acknowledge. C. Switch-off from PWRHOLD removal. Figure 5-2. Device State Control Through PWRON Signal Figure 5-3. PWRON Long-Press Turnoff |
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