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LTM4686BEVPBF 数据表(PDF) 111 Page - Analog Devices |
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LTM4686BEVPBF 数据表(HTML) 111 Page - Analog Devices |
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111 / 130 page  LTM4686B 111 Rev. 0 For more information www.analog.com APPENDIX C: PMBUS COMMAND DETAILS SMBALERT_MASK Default Setting: (Refer Also to Summary of the Status Registers, Figure 60) STATUS RESISTER ALERT Mask Value MASKED BITS STATUS_VOUTn 0x00 None STATUS_IOUTn 0x00 None STATUS_TEMPERATUREn 0x00 None STATUS_CML 0x00 None STATUS_INPUT 0x00 None STATUS_MFR_SPECIFICn 0x11 Bit 4 (internal PLL unlocked), bit 0 (GPIOn pulled low by external device) STATUS_BYTE The STATUS_BYTE command returns a one-byte summary of the most critical faults. STATUS_BYTE Message Contents: BIT STATUS BIT NAME MEANING 7 BUSY A fault was declared because the LTM4686B was unable to respond. 6 OFF This bit is set if the channel is not providing power to its output, regardless of the reason, including simply not being enabled. 5 VOUT_OV An output overvoltage fault has occurred. 4 IOUT_OC An output overcurrent fault has occurred. 3 VIN_UV Not supported (LTM4686B returns 0). 2 TEMPERATURE A temperature fault or warning has occurred. 1 CML A communications, memory or logic fault has occurred. 0 NONE OF THE ABOVE A fault Not listed in bits[7:1] has occurred. This command has one data byte Any supported fault bit in this command will initiate an ALERT event. STATUS_WORD The STATUS_WORD command returns a two-byte summary of the channel’s fault condition. The low byte of the STATUS_WORD is the same as the STATUS_BYTE command. STATUS_WORD High Byte Message Contents: BIT STATUS BIT NAME MEANING 15 VOUT An output voltage fault or warning has occurred. 14 IOUT An output current fault or warning has occurred. 13 INPUT An SVIN input voltage fault or warning has occurred. 12 MFR_SPECIFIC A fault or warning specific to the LTM4686B has occurred. 11 POWER_GOOD# The POWER_GOOD state is false if this bit is set. 10 FANS Not supported (LTM4686B returns 0). 9 OTHER Not supported (LTM4686B returns 0). 8 UNKNOWN Not supported (LTM4686B returns 0). Any supported fault bit in this command will initiate an ALERT event. This command has two data bytes. |
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