ZHCSI09S June 2010 – August 2018 TPS65911
Dynamic voltage frequency scaling (DVFS) operation: A supply voltage value corresponding to a targeted frequency of the digital core supplied is programmed in VDD1_OP_REG or VDD2_OP_REG registers.
The slew rate of the voltage supply reaching a new VDD1_OP_REG or VDD2_OP_REG programmed value is limited to 12.5 mV/µs, fixed value.
Adaptative voltage scaling (AVS) operation: A supply voltage value corresponding to a supply voltage adjustment is programmed in VDD1_SR_REG or VDD2_SR_REG registers. The supply voltage is then intended to be tuned by the digital core supplied, based its performance self-evaluation. The slew rate of VDD1 or VDD2 voltage supply reaching a new programmed value is programmable though the VDD1_REG or VDD2_REG register, respectively.
A serial control interface (optional mode for EN1 and EN2 pins) can be dedicated to voltage scaling applications, to give dedicated access to the VDD1_OP_REG, VDD1_SR_REG and VDD2_OP_REG, VDD2_SR_REG registers.
A general-purpose serial control interface (CTL-I2C) also gives access to these registers, if the SR_CTL_I2C_SEL control bit is set to 1 in the DEVCTRL_REG register (default inactive).
Both control interfaces are compliant with HS-I2C specification (100 Kbps, 400 Kbps, or 3.4 Mbps).