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Overview

        HC89S105A is an enhanced 8 bit microcontroller with high frequency and low power consumption CMOS process. It has up to 64K Bytes FLASH program memory, 256 Bytes IRAM and 4K Bytes XRAM, 6 groups bidirectional I/O, 1 peripheral function Ports total mapping module ,six 16-bit Timer/counters,2 PCA,3 groups 16 bits complementary PWM with dead-time control, 1 channel 8 bit PWM output, 2 UART, 1 IIC, 1 SPI, up to 32+2 channels 12 bits ADC, Integrated 16 bit*16bit multiplier, 16 bit/16 bit divisor , 32 bit/16 bit divisor, 4 system work modes (normal, low-frequency, STOP, IDLE) and 20 interrupt sources.