ZHCSNL3A December 2021 – November 2023 TPSM8D6C24
PRODUCTION DATA
| CMD Address | 29h |
| Write Transaction: | Write Word |
| Read Transaction: | Read Word |
| Format: | SLINEAR11 per CAPABILITY |
| Phased: | No |
| Updates: | Conversion Disable: on-the-fly. Conversion Enable: hardware update blocked. To update hardware after write while enabled, store to NVM with STORE_USER_ALL and RESTORE_USER_ALL or cycle AVIN below UVLO. |
| NVM Backup: | EEPROM or Pin Detection |
The VOUT_SCALE_LOOP command allows PMBus devices to map between the commanded voltage and the voltage at the control circuit input. In the TPSM8D6C24, VOUT_SCALE_LOOP also programs an internal precision resistor divider so no external divider is required.
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| VOSL_EXP | VOSL_MAN | ||||||
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| RW | RW | RW | RW | RW | RW | RW | RW |
| VOSL_MAN | |||||||
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Access | Reset | Description |
|---|---|---|---|---|
| 15:11 | VOSL_ EXP | RW | 11001b | Linear format two’s complement exponent |
| 10:0 |
VOSL_ MAN | RW | NVM | Linear format two’s complement mantissa |
Data Validity
Every binary value between the minimum and maximum supported values is writable and readable. However, not every combination is supported in hardware. Refer to Table 6-40:
| VOUT_SCALE_LOOP (DECODED) | Internal Divider Scaling Factor |
|---|---|
| Less than or equal to 0.125 | 0.125 |
| 0.125 < VOSL ≤ 0.25 | 0.25 |
| 0.25 < VOSL ≤ 0.5 | 0.5 |
| Greater than 0.5 | 1.0 |
Attempts to write (29h) VOUT_SCALE_LOOP to any value outside those specified as valid are considered invalid or 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.
If a (29h) VOUT_SCALE_LOOP value other than a supported internal divider scaling factor is programmed into (29h) VOUT_SCALE_LOOP and (21h) VOUT_COMMAND to VREF scale factors are calculated based on the actual (29h) VOUT_SCALE_LOOP value. (29h) VOUT_SCALE_LOOP values other than supported internal divider scaling factors can produce a mismatch between (21h) VOUT_COMMAND and the actual commanded output voltage.