Core voltage	1.8V
IO voltage	3.3V
Fabrication technology	CMOS 180nm, 5-Metal, available for mixed signal circuits

Architecture

Module Name	Function	Implementation Method
Rbias	Variable resistance to control the clock frequency	External component
Ring Oscillator	Current Control Oscillator	Full-custom circuit
LED Controller	Pulse width modulation and flicker circuit	Standard cell
IO Buffer	LED driver（Open drain, Max.12mA）	IP provided by the manufacturer
LED	Controlled LED	External component
RL	Adjusting load resistance	External component

IO port

Port Label	Attribute	Function
F_CTL	Analog Input	Frequency control
WIDTH[3:0]	Digital Input	Brightness control
RST_B	Digital Input	Reset
OUT	Digital Output	LED drive
VDDO	Power	3.3V Power
VDD	Power	1.8V Power
VSS	Power	Ground