SLUSEJ1 December 2021 TPSM8D6C24
|Write Transaction:||Write Word|
|Read Transaction:||Read Word|
|Format:||SLINEAR16, Absolute Only per Section 7.6.18.|
|VOUT_TRIM (High Byte)|
|VOUT_TRIM (Low Byte)|
|LEGEND: R/W = Read/Write; R = Read only|
|15:0||VOUT_ TRIM||RW||See Below||Output voltage offset. SLINEAR16 (two’s complement) format|
Limited NVM Backup
Only 8 bits of NVM backup are provided for this command. While the VOUT_TRIM command follows the Section 7.6.18 exponent, NVM back-up is stored with an exponent -12 and stored values will be limited to +127 to -128 with an exponent -12 irrespective of Section 7.6.18.
Referring to the data validity table in Section 7.6.19 (reproduced below), the output voltage value (including any offset from VOUT_TRIM, VOUT_COMMAND, VOUT_MARGIN, …) may not exceed the values supported by the DAC hardware.
Programming a Section 7.6.19 + Section 7.6.20 value greater than the maximum value supported by the DAC hardware but less than Section 7.6.21 will result in the regulated output voltage clamping at the maximum value supported by the DAC hardware without setting the VOUT_MAX_MIN bit in Section 7.6.56.
|VOUT_SCALE_LOOP||INTERNAL DIVIDER||VALID VOUT_COMMAND /MARGIN + VOUT_TRIM VALUES|
|1.0||None||0.000V to 0.700 V|
|0.5||1:1||0.000 V to 1.400 V|
|0.25||1:3||0.000 V to 2.800 V|
|0.125||1:7||0.000 V to 6.000 V|
The minimum and maximum valid data values for VOUT_TRIM follow the description in Section 7.6.19. Attempts to write VOUT_TRIM to any value outside those specified as valid, will be considered invalid/unsupported data and cause the TPSM8D6C24 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.
Writes to VOUT_TRIM for which the resulting output voltage is greater than the current Section 7.6.21, or less than the current Section 7.6.26, cause the reference DAC to move to the value specified by Section 7.6.26 or Section 7.6.21, respectively, and cause the VOUT_MAX_MIN_WARNING fault condition, setting the appropriate bits in Section 7.6.55, Section 7.6.56 and notifying the host per the PMBus 1.3.1 Part II specification, section 10.2.