SLVSH95 July 2024 TPS546C25
ADVANCE INFORMATION
| CMD Address: | 7Ah |
| Write Transaction: | Write Byte |
| Read Transaction: | Read Byte |
| Format: | Unsigned Binary (1 byte), read + writable clear |
| NVM Back-up: | Yes |
| Updates: | On-the-fly |
The STATUS_VOUT command returns one data byte with contents regarding output voltage warnings and faults as follows. None of these bits is affected by the state of SMBALERT_MASK. However, if the corresponding fault/warning disable bits in the FAULT_CTRL register is set, then the corresponding status bits will also be blocked in addition to blocking the response from that fault. The status bits remain latched after the fault condition is no longer present (as conveyed by digital input fault/warning signal). They can be cleared by power-cycle, issuing the CLEAR_FAULTS command, or by toggling the on-off mechanism of the rail (as configured in the (02h) ON_OFF_CONFIG register.
All supported bits may be cleared either by CLEAR_FAULTS, turning on the output through the mechanism programmed into ON_OFF_CONFIG, or individually by writing 1b to the STATUS_VOUT register in their position, per the PMBus 1.3.1 Part II specification section 10.2.3.
Return to Supported PMBus Commands.
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RW1C | RW1C | RW1C | RW1C | RW1C | R | R | R |
| OVF | OVW | UVW | UVF | VO_MAX_MIN_W | 0 | 0 | 0 |
| LEGEND: R/W1C = Read/Write 1 to clear; R = Read only |
| Bit | Field | Access | Reset | Description |
|---|---|---|---|---|
| 7 | OVF | RW1C | 0b | 0b: Latched flag indicating an output overvoltage fault has NOT occured. 1b: Latched flag indicating an output overvoltage fault has occured. |
| 6 | OVW | RW1C | 0b | 0b: Latched flag indicating an output overvoltage warning has NOT occured. 1b: Latched flag indicating an output overvoltage warning has occured. Note: OVW status bit will set automatically in the event of an OVF after soft start. If OVF is tripped before completion of soft start (fixed OVF), then the OVW status is not set. |
| 5 | UVW | RW1C | 0b | 0b: Latched flag indicating an output undervoltage fault has NOT occured. 1b: Latched flag indicating an output undervoltage fault has occured. Note: UVW status bit will also set automatically in the event of an UVF. |
| 4 | UVF | RW1C | 0b | 0b: Latched flag indicating an output undervoltage warning has NOT occured. 1b: Latched flag indicating an output undervoltage warning has occured. |
| 3 | VOUT_MAX_MIN_W | RW1C | 0b | 0b: Latched flag indicating a VOUT_MAX_MIN warning as described in
VOUT_COMMAND has NOT occurred. 1b: Latched flag indicating a VOUT_MAX_MIN warning as described in VOUT_COMMAND has occurred. |
| 2:0 | Not supported | R | 000b | Not supported and always set to 0. |