AT89C51AC3-RDTUM Microchip

Features 80C51 Core Architecture 256 Bytes of On-chip RAM 2048 Bytes of On-chip ERAM 64K Bytes of On-chip Flash Memory Data Retention: 10 Years at 85C Read/Write Cycle: 100K Boot Code Section with Independent Lock Bits 2K Bytes of On-chip Flash for Bootloader In-System Programming by On-Chip UART Boot Program and IAP Capability 2K Bytes of On-chip EEPROM Enhanced 8-bit Read/Write Cycle: 100K Integrated Power Monitor (POR: PFD) To Supervise Internal Power Supply Microcontroller 14-sources 4-level Interrupts Three 16-bit Timers/Counters with 64KB Flash Full Duplex UART Compatible 80C51 High-speed Architecture Memory In Standard Mode: 40 MHz (Vcc 3V to 5.5V, both Internal and external code execution) 60 MHz (Vcc 4.5V to 5.5V and Internal Code execution only) In X2 mode (6 Clocks/machine cycle) AT89C51AC3 20 MHz (Vcc 3V to 5.5V, both Internal and external code execution) 30 MHz (Vcc 4.5V to 5.5V and Internal Code execution only) Five Ports: 32 + 4 Digital I/O Lines Five-channel 16-bit PCA with PWM (8-bit) High-speed Output Timer and Edge Capture Double Data Pointer 21-bit WatchDog Timer (7 Programmable Bits) A 10-bit Resolution Analog to Digital Converter (ADC) with 8 Multiplexed Inputs SPI Interface (PLCC52 and VPFP64 packages only) On-chip Emulation Logic (Enhanced Hook System) Power Saving Modes Idle Mode Power-down Mode Power Supply: 3 volts to 5.5 volts Temperature Range: Industrial (-40 to +85C) Packages: VQFP44, PLCC44, VQFP64, PLCC52 Description The AT89C51AC3 is a high performance Flash version of the 80C51 single chip 8-bit microcontrollers. In X2 mode a maximum external clock rate of 20 MHz reaches a 300 ns cycle time. Besides the AT89C51AC3 provides 64K Bytes of Flash memory including In-System Programming (ISP) and IAP, 2K Bytes Boot Flash Memory, 2K Bytes EEPROM and 2048 byte ERAM. Primary attention is paid to the reduction of the electro-magnetic emission of AT89C51AC3. Rev. 4383D805102/08Block Diagram XTAL1 RAM Flash Boot EE ERAM PCA XTAL2 UART Timer2 256x8 64k x 8 loader PROM 2048 2kx8 2kx8 ALE C51 CORE IB-bus PSEN CPU EA Timer 0 INT Parallel I/O Ports and Ext. Bus Emul Watch SPI 10 bit RD Timer 1 Ctrl Dog Unit Interface ADC Port 0Port 1 Port 2 Port 3 Port 4 WR Notes: 1. 8 analog Inputs/8 Digital I/O 2. 5-Bit I/O Port 2 AT89C51AC3 4383D805102/08 RESET T0 RxD T1 TxD INT0 INT1 Vcc P0 Vss P1(1) P2 P3 P4(2) ECI PCA T2EX T2 MOSI SCK MISO