ZHCSOF7B september 2022 – june 2023 TPS25990
PRODUCTION DATA
BB_CONFIG is a manufacturer-specific command for configuring or reading the behavior of the Blackbox function as described in Section 8.3.14.11.
This command uses the PMBus® read or write byte protocol.
The details of this register are shown in Table 9-69.
Bit | Name | Value | Description | Default | Access |
---|---|---|---|---|---|
7 | FET_OFF_WR | BB EEPROM write trigger | Read/Write | ||
1 | Power FET turning OFF triggers write to BB EEPROM | 0 | |||
0 | Power FET turning OFF doesn’t trigger write to BB EEPROM | ||||
6 | FLT_WR | BB EEPROM write trigger | |||
1 | Global Fault triggers write to BB EEPROM | 0 | |||
0 | Global Fault doesn’t trigger write to BB EEPROM | ||||
5 | ALERT_WR | BB EEPROM write trigger | |||
1 | SMBA# assertion triggers write to BB EEPROM | 0 | |||
0 | SMBA# assertion doesn’t trigger write to BB EEPROM | ||||
4:2 | Reserved | 000 | Reserved | 000 | |
1:0 | BB_TICK | Blackbox timestamp tick interval | |||
11 | 3500 µs | 00 | |||
10 | 870 µs | ||||
01 | 220 µs | ||||
00 | 55 µs |
A write command to this register should be preceded by the MFR_WRITE_PROTECT command to unlock the device first to prevent accidental accidental/spurious writes.
BB_CONFIG[5] needs to be used in conjunction with the ALERT_MASK register to determine which events trigger the Blackbox write to the external EEPROM. However, the GLBL_FLT (ALERT_MASK[6]) signal is excluded from the list of signals driving ALERT for Blackbox write even if they are unmasked in the ALERT_MASK register.