Scope

YF52H54BP is an EPROM based 8-bit MCU, built-in with a lithium battery charger and NMOS driver, tailored for applications like lithium charging control and motor driver. YF52H54BP adopts advanced CMOStechnology to provide customers remarkable solution with low cost and high performance benefits. RISCarchitecture is applied to YF52H54BP and it provides 55 instructions.All instructions are executed in singleinstruction cycle except program branch and skip instructions which will take two instructioncycles.Therefore, YF52H54BP is very suitable for those applications that are sophisticated but compactprogram size is required.

In terms of I/O resources, YF52H54B has 4 flexible bidirectional I/O pins and each I/O pin has a separateregister to control it as an input or output pin. Moreover, each I/O pin can be configured through relevantregisters to enable features such as, like Pull-High/Pull-Low resistor and open-drain output type throughprogramming,and at the same time, provides 1 set of Pulse Width Modulation (PWM) output. Moreover, YF52H54B has built-in infrared (IR) carrier generator with selectable IR carrier frequency and polarity forapplications which demand remote control feature.

The YF52H54BP integrates an NMOS driver circuit, which enables high-current switch control for motors, LED modules, and other products.

The YF52H54BP also features a built-in single-cell lithium battery charging management circuit. Thecharging current can be adjusted through an external resistor. It offers characteristics such as charging currentmonitoring, under-voltage lockout, and automatic recharging. It is suitable for operation with USB powerand adapter power, making it an ideal choice for portable applications.