JAJSQT1 July 2024 TPS546E25
ADVANCE INFORMATION
CMD Address | 20h |
Write Transaction: | N/A |
Read Transaction: | Read Byte |
Format: | Unsigned Binary (1 byte) |
NVM Back-up: | No |
Updates: | N/A |
The data byte for the VOUT_MODE command is one byte that consists of a one bit absolute/relative selection (always set to 1 for relative), two bit MODE, and five bit EXPONENT as shown in Figure 7-21. The two bit MODE sets whether the device uses the ULINEAR16, Half-precision IEEE 754 floating point, VID or DIRECT modes for output voltage related commands. The five bit PARAMETER provides more information about the selected mode, such as the ULINEAR16 exponent or which manufacturer's VID codes are being used.
Return to Supported PMBus Commands.
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
R | R | R | R | R | R | R | R |
REL | VOUT_MODE | VOUT_EXPONENT |
LEGEND: R/W = Read/Write; R = Read only |
Bit | Field | Access | Reset | Description |
---|---|---|---|---|
7 | REL | R | 1b | 1b: Relative data format |
6:5 | MODE | R | 00b | 00b: Linear format (ULINEAR16, SLINEAR16) |
4:0 | VOUT_EXPONENT | R | 10111b | Specifies the exponent “N” to use with output voltage related commands, in two’s complement format. Value is fixed at -9 (1.953mV/LSB). |
Attempts to write VOUT_MODE to any value will be considered invalid/unsupported data and cause the device to respond by flagging the appropriate status bits and notifying the host according to the PMBus 1.3.1 Part II specification, section 10.9.3.