JAJSFL9C July 2016 – June 2018 TPS546C20A
PRODUCTION DATA.
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The TON_RISE command sets the time in milliseconds, from when the reference starts to rise until the voltage has entered the regulation band. The contents of this register can be stored to nonvolatile memory using the STORE_DEFAULT_ALL command.
For loop slave device, this command cannot be accessed. Any writes to this command will be ignored. An attempt to read or write this command will result in a NACK’d command, the reporting of an IVC fault, and triggering of SMB_ALERT.
Programming a value of 0 instructs the unit to bring its output voltage to the programmed regulation value as quickly as possible. For the TPS546C20A device, this results in an effective TON_RISE time of 1ms (fastest time supported).
If the soft-start detection feature is being used (SS pin not pulling up high), then the Mantissa value decoded or derived by from the appropriate SS resistor writes into the TON_RISE register as the initial default. Note: This write overwrites any value restored from the EEPROM restore operation at initial power-up.
The TON_RISE command is formatted as a linear mode two’s complement binary integer.
| COMMAND | TON_RISE | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Format | Linear, two's complement binary | |||||||||||||||
| Bit Position | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Access | r | r | r | r | r | r | r | r | r | r/wE | r/wE | r/wE | r/wE | r/wE | r/wE | r/wE |
| Function | Exponent | Mantissa | ||||||||||||||
| Default Value | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |