Zilog Z51F3220

The Zilog Z51F3220 is an 8051 compatible MCU up to 16 MHz, with 2 Datapointers, 32 KByte On-Chip Flash ROM, 256 Bytes RAM, 768 Bytes XRAM (27 Bytes including LCD display RAM), 23 interrupts with 4 priority levels and 6 priority groups, 12-Bit ADC 16-Channels, 8-Bit Buzzer unit with 1 channel, 16-Bit PPG unit, 2 PWM units (8-Bit, 10-Bit), 8-Bit SPI unit Low voltage indicator for 13 different levels, Low voltage reset unit for 14 different levels, 2 USART channels (UART/SPI/I2C), up to 9 ports, Up to 40 I/O Ports, Bronw-Out detector, LCD Driver for 21 Segments and 8 common terminals, 5 Timer units, 1 8-Bit Watchdog Timer (WDT), 1 Watch Timer (WT), 1 8-Bit Basic Interval Timer (BIT), 3 10-Bit PWM, On-Chip 16MHz oscillator, 125KHz Oscillator, and On-Chip debugger.