The T89C51AC2 is a high-performance Flash version of the 80C51 single-chip 8-bit microcontrollers. It contains a 32 KB Flash memory block for program and data. The 32 KB Flash memory can be programmed either in parallel mode or in serial mode with the ISP capability or with software. The programming voltage is internally generated from the standard VCC pin. The T89C51AC2 retains all features of the 80C51 with 256 bytes of internal RAM, a 7-source 4-level interrupt controller, and three timer/counters. In addition, the T89C51AC2 has a 10-bit A/D converter, a 2 KB Boot Flash memory, 2 KB EEPROM for data, a Programmable Counter Array, an XRAM of 1024 bytes, a Hardware Watch-Dog Timer, and a more versatile serial channel that facilitates multiprocessor communication (EUART). The fully static design of the T89C51AC2 reduces system power consumption by bringing the clock frequency down to any value, even DC, without loss of data.
