Datasheet

11.

Function Description

11.1. Power

There are a Power-Reset circuit in AC101 used to reset all the circuit and register to a standby state after

power up. The Power-Reset circuit make all the supply power need no specific timing. All the supply

voltages are illustrated in the below figure.

Figure 5 Power Management

VDD-CORE is 1.2V for audio digital core power generated from LODIN pin, which also can be direct

supplied from VDD-CORE pin. VDD-IO0 is digital I/O power for I2C/RSB . VDD-IO1 is digital I/O

power for I2S1. AVCC is for analog power. CPVDD for charge pump power.

When the AC101 is not working, it need to set the supply properly to prevent power leakage. There are two

settings to select. It's best to power off all the supply. The other is to make sure AV C C and CPVDD both

power on.

At the setting below, AC101 has the best performance.

LDOIN

VDD_CORE

AVCC

CPVDD

VCC-IO0

VCC-IO1

BYPASS

1.5~~3.3 V

1.2 V

3 V

1.8 V

1.8/3.3 V

1.2 V

Supplied

N/A

Supplied

N/A

* VDD_CORE and BYPASS generated by internal LDO.