Shenzhen Jinrui Technology Co., Ltd.

It is a high-tech company integrating integrated circuit design, system software, hardware design and IC sales. It is composed of senior industry managers, senior system designers, and senior software and hardware designers. The main personnel all have more than ten years of experience in design and management, and have more than 50 independently developed core patented technologies. And obtained the "National High-tech Enterprise Certification", "Shenzhen Software Enterprise Certification" and "Integrated Circuit Design Enterprise Certification". The company's main products: 8bit MCU, 32bit MCU, radio/DAB receiving module, CD servo audio decoding chip. We also provide customers with application technology services for various types of home appliances, home audio, car audio, health electronics, DSP radio, DAB and consumer electronics.        

 The company provides high-quality services such as chip design, system integration, software and hardware technology development, and production support to jointly explore business opportunities and develop together with its partners. Adhering to the business philosophy of "people-oriented, customer first", we work hard to provide customers with innovative, competitive, and cost-effective chip and product solutions.

The CA51F251L2 chip is an 8-bit microcontroller based on the 1T 8051 core. Under normal circumstances, it runs 10 times faster than the traditional 8051 chip and has superior performance. Built-in Flash program memory can be reprogrammed multiple times. This series of chips provides 8K Flash capacity for customers to choose according to product needs, which brings great convenience to user development. It not only retains the basic characteristics of the traditional 8051 chip, but also integrates functions such as 12Bit ADC, LCD/LED driver, Touch Key, 16 Bit PWM, UART, RTC, brushless DC motor driver, multiplier and divider, low voltage detection (LVD), etc. module. Supports three power-saving modes: IDLE, STOP and low-speed operation to adapt to applications with different power consumption requirements. The powerful functions and superior anti-interference performance make it widely used in various car audios, home audios, small appliances, Bluetooth speakers, automotive electronics, digital motors, sports equipment, motor control, medical care, instrumentation, security, and power supplies. Control, industrial control products.

Product Details

Kernel

CPU: 1T 8051, 10 times faster than traditional 8051

Compatible with 8051 instruction set, dual DPTR working mode

CPU frequency: can support 27MHz

memory

Flash: 8K bytes, supports repeated erasing and writing multiple times

Flash can be divided into program space and data space. The data space can be used to store data that needs to be saved after power failure. EEPROM can be omitted.

RAM: 256 bytes internal RAM, 2K bytes external RAM

Operating Voltage

Working voltage: 1.8 - 5.5V

clock system

External high-speed oscillator: 1 - 27MHz

External RTC oscillator: 32.768KHz

Built-in low-speed RC oscillator: 131KHz

Built-in PLL: frequency multiplication factor is 2-10 times, reference clock is 2-4MHz, built-in RC oscillator

Built-in high-speed RC oscillator: 2 - 4MHz, accuracy up to 1% (factory initial frequency is 3.6864MHz＠3.3V/25℃)

The built-in external clock monitoring module can effectively monitor the working status of each external clock to avoid crashes caused by the external clock stopping.

RTC function

The built-in RTC module can measure time, minutes, seconds, days of the week, and supports alarm clock function.

Supports millisecond and half-second interrupts

interrupt system

15 active interrupt sources

Two levels of interrupt priority, supporting interrupt nesting

10 external interrupt sources, each external interrupt can be configured with any signal pin as an interrupt input pin

timer

3 16-bit general-purpose timers: Timer 0, Timer 1, Timer 2

General purpose input and output port (GPIO)

Supports up to 46 GPIO ports (different models will vary)

Supports push-pull, open-drain, strong pull-up, weak pull-up, strong pull-down, weak pull-down, and high-impedance modes

Different drive strength and flip speed can be set in push-pull mode

Touch Key

Built-in touch-sensitive controller

Support 15 touch channels

Touch to set internal charging and internal reference, which can effectively suppress low-frequency interference from the power supply

Supports multiplexing of touch pins and LED drive pins

Built-in waterproof compensation mechanism

High anti-interference, compliant with EMC (CS) standards

Support touch power saving mode, the lowest power consumption is less than 10uA

Analog-to-digital converter (ADC)

Supports 6-channel 12-bit SAR ADC with built-in operational amplifier and comparison functions

Supports 3 reference voltage sources: VDD, internal reference, external reference

VDD voltage can be measured when the internal voltage is selected as the reference voltage

Supports detection signal reduction and amplification functions, and the zoom factor is optional

PWM

Supports 5-channel PWM, the period and duty cycle can be configured arbitrarily within the 16-bit range

Supports complementary mode and dead zone control, can be used to drive brushless DC motors

Supports configurable edge alignment and center alignment modes

Supports direct output of internal clock function

Support PWM interrupt

LCD driver

Can support 5com x 24seg, 4com x 25seg

Configurable duty cycle: 1/2, 1/3, 1/4, 1/5, 1/6, 1/7, 1/8 Duty

Configurable bias: 1/2, 1/3, 1/4 Bias

Supports 8 levels of contrast adjustment

Supports 3 levels of driving current, users can adjust according to different LCD screens

LED driver

Can support 5com x 24seg

Support 8 levels of brightness adjustment

Low voltage detection (LVD)

Configurable voltage detection range 1.8 - 4.8V

Low voltage reset or interrupt can be set

reset mode

The chip supports multiple reset sources: hard reset, soft reset, watchdog reset, low voltage detection reset, power-on/power-down reset

watchdog

27-bit watchdog timer, 16-bit adjustment accuracy, configurable watchdog reset or interrupt

Remote control receiving function

Built-in sampling counter module (SAMPLE) can sample pulse widths of any length through hardware modules, reducing software code

Universal Serial Interface (UART)

Supports up to 3 UART interfaces

Supports 1-byte receive buffer

SPI interface

Built-in 1 4-wire SPI interface, supports master-slave mode

I2C interface

Built-in 1-channel I2C interface, supports master-slave mode, supports standard/fast/high-speed mode

I2C can be set up with digital filtering to enhance I2C anti-interference performance.

Op amps and analog comparators

Supports 4 analog comparators, two operational amplifiers and a capture counter

Analog comparator reference voltage selectable internal reference or external input reference

The analog comparator has a built-in 15-bit digital filter and supports comparator interrupts.

The op amp can be used in combination with ADC and analog comparator to expand the detection signal voltage range.

The capture counter and analog comparator are used together to measure motor speed and stall detection.

Brushless DC motor drive

Built-in 60° Hall and 120° Hall decoding modules

Support automatic mode and manual mode, support braking function

Supports multiple anomaly detection

Combined with analog comparators, it is possible to realize Hull-free DC motor drive

Multiply and divide unit (MDU)

Supports 16-bit × 16-bit multiplication in 1 clock cycle

Supports 8 clock cycles 32-bit ÷ 32-bit division

Supports left and right shifting operation of 32-bit data in 1 clock cycle

Program download and simulation

Supports ISP and IAP

Support online simulation function

Low power consumption

STOP mode, current<7uA

IDLE mode, current<12uA

Low speed operation mode, current<20uA

Package type: LQFP48 (7 x 7 mm)