ZHCSGE0B June 2017 – January 2019 TPS53681
PRODUCTION DATA.
The OPERATION command is used to turn the device output on or off in conjunction with the input from the AVR_EN pin for channel A, and BEN pin for channel B, according to the configuration of the ON_OFF_CONFIG command. It is also used to set the output voltage to the upper or lower MARGIN levels.
OPERATION is a paged register. In order to access OPERATION command for channel A, PAGE must be set to 00h. In order to access OPERATION register for channel B, PAGE must be set to 01h. For simultaneous access of channels A and B, the PAGE command must be set to FFh.
The OPERATION command must be accessed through Read Byte/Write Byte transactions.
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RW | R | RW | RW | RW | RW | RW | RW |
| ON | 0 | MARGIN | 0 | 0 | |||
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Type | Reset | Description |
|---|---|---|---|---|
| 7 | ON | RW | 0b |
Enable/disable power conversion for the currently selected channel(s) according to the PAGE command, when the ON_OFF_CONFIG command is configured to require input from the ON bit for output control. Note that there may be several other requirements that must be satisfied before the currently selected channel(s) can begin converting power (e.g. input voltages above UVLO thresholds, AVR_EN/BEN pins high if required by ON_OFF_CONFIG, etc...) 0b: Disable power conversion 1b: Enable power conversion |
| 5:2 | MARGIN | RW | 0000b |
Set the output voltage to either the value selected by the VOUT_MARGIN_HIGH or MARGIN_LOW commands, for the currently selected channel(s), according to the PAGE command. 0000b: Margin Off. Output voltage is set to the value of VOUT_COMMAND 0101b: Margin Low (Ignore Fault). Output voltage is set to the value of VOUT_MARGIN_LOW. 0110b: Margin Low (Act on Fault). Output voltage is set to the value of VOUT_MARGIN_LOW. 1001b: Margin High (Ignore Fault). Output voltage is set to the value of VOUT_MARGIN_HIGH 1010b: Margin High (Act on Fault). Output voltage is set to the value of VOUT_MARGIN_HIGH. |
| 1:0 | 0 | RW | 00b | These bits are writeable but should always be set to 00b. |
Note that the VOUT_MAX_WARN bit in STATUS_VOUT can be caused by a margin operation, if "Act on Fault" is selected, and the VOUT_MARGIN_HIGH/VOUT_MARGIN_LOW value loaded by the margin operation exceeds the value of VOUT_COMMAND.