ZHCSNL3A December 2021 – November 2023 TPSM8D6C24
PRODUCTION DATA
| CMD Address | 19h |
| Write Transaction: | N/A |
| Read Transaction: | Read Byte |
| Format: | Unsigned Binary (1 byte) |
| Phased: | No |
| NVM Backup: | No |
| Updates: | N/A |
The CAPABILITY command provides a way for the host to determine the capabilities of this PMBus device. This command is read-only and has one data byte formatted as the following:
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| R | R | R | R | R | R | R | R |
| PEC | SPEED | ALERT | FORMAT | AVSBUS | 0 | 0 | |
| LEGEND: R/W = Read/Write; R = Read only |
| Bit | Field | Access | Reset | Description |
|---|---|---|---|---|
| 7 | PEC | R | 1b | 1b: Packet Error Checking is supported. |
| 6:5 | SPEED | R | 10b | 10b: Maximum supported bus speed is 1 MHz. |
| 4 | ALERT | R | 1b | 1b: The device has an SMB_ALERT# pin and supports the SMBus Alert Response protocol. |
| 3 | FORMAT | R | 0b | 0b: Numeric format is LINEAR or DIRECT. |
| 2 | AVSBUS | R | 0b | 0b: AVSBus is NOT supported. |
| 1:0 | Reserved | R | 00b | Reserved. Always set to 0. |
Attempts to write (19h) CAPABILITY to any value 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.