In July 1998, Fudan Microelectronics was jointly founded by Fudan University's "National Key Laboratory of ASICs and Systems", Shanghai Commercial Investment Company and a group of entrepreneurs who dreamed of creating the best integrated circuit design company (chip design) in China. Since its establishment, the company has successfully established a pivotal position in the domestic integrated circuit design industry. The company was listed in Hong Kong on August 4, 2000 (stock code: 1385), becoming the first listed company in the domestic integrated circuit design industry. Today, Fudan Microelectronics has grown from more than 10 entrepreneurs to a company with more than 600 employees, with users all over the world. The company has attracted the attention of domestic and foreign peers with its excellent management, good development potential and outstanding performance. In 2011, Fudan Microelectronics was selected as the "Best Small and Medium-sized Listed Company" by the editors of Forbes Asia magazine.
Security and identification chips, including identification and storage, intelligence and security, and identification device modules
Smart meter, MCU for smart meter, power line carrier
Non-volatile memory, EEPROM, SPI NOR Flash, SPI NAND Flash, NNVM
Special analog circuit, special circuit for leakage protector, special circuit for A-type leakage protector, special circuit for leakage protector with overvoltage and undervoltage, special circuit for S-type leakage protector, telephone call circuit, lighting automobile and motorcycle electronic circuit
Beidou navigation, Beidou baseband processing circuit chip JFM7101 for "Linghang No. 1", Beidou baseband processing circuit chip JFM7201 for "Linghang No. 2", Beidou real-time clock circuit chip JFM7202
Introduction to the FM331X series of dedicated MCU chips for smart energy meters
Features
The FM331x series is a series of MCU chips dedicated to smart meters. The chips have a 16-bit enhanced 8xC251 processor core, large-capacity FLASH program memory (128KB), 4KB RAM, integrated LCD driver, RTC with temperature compensation, ADC, and general peripheral interfaces such as UART, I2C, SPI, 7816, etc.
Parameters
■ Operating voltage range: 2.0V-5.5V
■ Operating temperature range: -40℃-85℃
■ Built-in 16-bit Flip80251 core
■ Built-in LCD/LED driver circuit
■ 128Kbytes FLASH program memory, can be programmed multiple times
■ 4Kbytes xRAM
■ Built-in low-power hardware real-time clock (RTC) with temperature compensation function, which can meet the clock accuracy requirements of the State Grid smart energy meter specification requirements
■ Built-in 4 independent hardware UARTs, all support infrared modulation output function and receiving signal capture function (this function can realize baud rate adaptation)
■ Built-in 2 independent hardware 7816 protocol interfaces, which can be easily connected with smart CPU card and ESAM security module
■ Built-in 1-way SPI interface, convenient for connecting SPI interface peripherals
■ Built-in 1-way I2C interface, can be easily connected with serial memory (EEPROM)
■ Built-in power-on reset (POR), power-down reset (BOR) and low voltage detection (LVD) circuits
■ Built-in watchdog timer (WDT)
■ Built-in 11-bits ADC channel
■ Support multiple working modes and sleep wake-up methods to meet the needs of different power consumption
■ JTAG online programming and debugging interface (Bird-Owl)
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Power technology
Microcontroller MCU
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Analog electronics
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