XX7299A是一款低价位且具有强抗干扰能力的多功能单片机外围芯片。它整合了数码管显示驱动（8 位数码管或者64 位LED）和键盘扫描（64个）控制，以及片上256字节E2PROM和256字节SRAM ，集成RTC（带有阴历和节气算法）、2路8位ADC（贴片）。XX7299A内置8MHz RC振荡电路，采用两线通信接口（兼容I2C）与单片机通信。-XX7299A is low and with the strong anti-jamming capability, multi-purpose microcontroller peripheral chips. It integrates a digital control display driver (eight digital tube or 64 LED) and the keyboard scan (64) control, and on-chip 256 byte E2PROM and 256 byte SRAM, Integrated RTC (with the lunar calendar and the Solar algorithm), two road eight ADC (SMT). XX7299A 8 MHz internal RC oscillator circuit, using two line Communication Interface (I2C compatible) and SCM communication.