MIC7401 Datasheet, PDF (48/68 Pages) Micrel Semiconductor – Configurable PMIC, Five-Channel Buck Regulator plus One-Boost with HyperLight Load®, I2C Control, and Enable

Micrel, Inc.
Special Host I²C Commands
The following commands are all 2 byte communications:
Byte1 = device address with write bit set, LSB = 0
Byte2 = special key
MIC7401
Special Keys
• SAVECONFIG Key = 66’h. Saves the shadow register configuration data into EEPROM registers 03’h thru 23’h.
• RESET Key = 6A’h. Reloads only NORMAL mode voltage and current limit settings then enables the regulator to
NORMAL mode with no soft-start, no sequencing, and no delays. Then clears the STANDBY register bit 6 in register
03’h.
• RELOAD Key = 6B’h. Reloads all data from EEPROM into the shadow registers. No other actions are performed,
including soft-start, sequencing, and delay.
• REBOOT Key = 6C’h. Turns all regulators OFF, reloads EEPROM data into shadow registers, and then re-
sequences the regulators with the programmed soft-start and sequence delays.
• SEQUENCE Key = 6D’h. Turns all regulators OFF, restarts the sequencer including soft-start and sequence delays.
March 16, 2015
48
Revision 1.0