AT89C51AC3-S3SUM Datasheet PDF - Microchip

●The AT89C51AC3-S3SUM is a high-performance 8-bit single-chip Flash Microcontroller. In X2 mode a maximum external clock rate of 20MHz reaches a 300ns cycle time. Besides the AT89C51AC3 provides 64kB of flash memory including In-system programming (ISP) and IAP, 2kB boot flash memory, 2kB EEPROM and 2048B ERAM.

● 80C51 Core architecture

● Boot code section with independent lock bits

● In-system programming by on-chip UART boot program and IAP capability

● Integrated power monitor (POR - PFD) to supervise internal power supply

● 14-sources 4-level Interrupts

● Three 16-bit timers/counters

● Full duplex UART compatible 80C51

● Five ports - 32 + 4 digital I/O lines

● Five-channel 16-bit PCA

● Double data pointer

● 21-bit Watchdog timer (7 Programmable bits)

● 10-bit resolution Analog-to-digital converter (ADC) with 8 multiplexed Inputs

● On-chip Emulation logic (Enhanced hook system)

● Power saving modes - Idle mode, Power-down mode