Datasheet SiC951 (Vishay) - 8

SiC951
www.vishay.com Vishay Siliconix
PMBus COMMAND COMM. PMBus COMM. # DATA DEFAULT EXP. VALID DESCRIPTION DEFAULT CODES COMMANDS STRUCT. BYTES VALUE (FIXED) VALUES
0x00 Page 119 Set the operation mode, on / off and margining bit 7 set to 1: ON, 0: OFF bit 6 set to 1: use TOFF_DELAY setting 0: fast turn off bit 5 and 4 output setting 00: VOUT_COMMAND 01: VOUT_MARGIN_LOW 0x01 OPERATION Byte 10: VOUT_MARGIN_HIGH 1 0x88 11: AVS (disabled) bit 3 and 2 fault setting, in case VOUT_MARGIN_LOW/HIGH exceed VOUT_OV/UV_FAULT_LIMIT 01: ignore 10: alert according to VOUT_OV/UV_FAULT_RESPONSE bit 0 and 1 NA Sets the ON / OFF behavior bit 4 - power up, set to 1: according to OPERATION 0: when power is present bit 3 - PMBUS OPERATION 0: ignore ON / OFF 1: use ON / OFF bit 2 - CONTROL pin 0x02 ON_OFF_CONFIG Byte 1 0x1F 0: ignore CONTROL 1: use CONTROL bit 1 - control pin polarity 0: active low 1: active high bit 0 - turn OFF delay and fall time 0: use settings 1: fast Clears all faults and SMB_ALERT If device is still in fault mode it will alert 0x03 CLEAR_FAULTS Send byte 1 again does not release from latch condition. 0x10 WRITE_PROTECT Byte Set the write protection 1 0x00 0x15 STORE_USER_ALL Send byte Stores all user registers to NVM 1 0x16 RESTORE_USER_ALL Send byte Restores all user registers from NVM 1 Sets capabilities of PMBUS bit 7 - PEC 1: enable bit 6 and 5 - bus speed: PEC 10: 1 MHz (ON / OFF) 0X19 CAPABILITY Byte bit 4 - SMB_ALERT 1 0xD0 SMB_ALERT 1: pin available (ON / OFF) bit 3 - numeric format 0: linear bit 2 - AVSBUS 0: no SMBALERT mask vectors: NVM / registers 2 bytes - 1st: 0X1b SMBALERT_MASK Block 7 STATUS_x command code, 2nd: mask byte (retrieve mask data is elaborated in spce) S23-0736-Rev. C, 12-Sep-2023
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