AT89C51ED2-UM

Product Summary

The AT89C51ED2-UM is a high performance CMOS Flash version of the 80C51 CMOS single chip 8-bit microcontroller. The AT89C51ED2-UM contains a 64-Kbyte Flash memory block for code and for data. The 64-Kbytes 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 AT89C51ED2-UM retains all of the features of the Atmel 80C52 with 256 bytes of internal RAM, a 9-source 4-level interrupt controller and three timer/counters. The AT89C51ED2-UM provides 2048 bytes of EEPROM for nonvolatile data storage. In addition, the AT89C51ED2-UM has a Programmable Counter Array, an XRAM of 1792 bytes, a Hardware Watchdog Timer, SPI interface, Keyboard, a more versatile serial channel that facilitates multiprocessor communication (EUART) and a speed improvement mechanism (X2 Mode). The fully static design of the AT89C51ED2-UM allows to reduce system power consumption by bringing the clock frequency down to any value, including DC, without loss of data.

Parametrics

AT89C51ED2-UM absolute maximum ratings: (1)I=industrial: -40℃ to 85℃; (2)Storage Temperature: -65℃ to + 150℃; (3)Voltage on VCC to VSS: -0.5V to + 6.5V; (4)VVoltage on Any Pin to VSS: -0.5V to VCC + 0.5V; (5)Power Dissipation: 1W.

Features

AT89C51ED2-UM features: (1)80C52 Compatible; (2)Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply; (3)ISP (In-System Programming) Using Standard VCC Power Supply; (4)2048 Bytes Boot ROM Contains Low Level Flash Programming Routines and a Default Serial Loader; (5)High-speed Architecture; (6)64K Bytes On-chip Flash Program/Data Memory; (7)On-chip 1792 bytes Expanded RAM (XRAM); (8)On-chip 2048 Bytes EEPROM Block for Data Storage (AT89C51ED2 Only); (9)100K Write Cycles; (10)Dual Data Pointer; (11)Variable Length MOVX for Slow RAM/Peripherals; (12)Improved X2 Mode with Independent Selection for CPU and Each Peripheral; (13)Keyboard Interrupt Interface on Port 1; (14)SPI Interface (Master/Slave Mode); (15)8-bit Clock Prescaler; (16)16-bit Programmable Counter Array; (17)Asynchronous Port Reset; (18)Full-duplex Enhanced UART with Dedicated Internal Baud Rate Generator; (19)Low EMI (Inhibit ALE); (20)Hardware Watchdog Timer (One-time Enabled with Reset-Out), Power-off Flag; (21)Power Control Modes: Idle Mode, Power-down Mode; (22)Single Range Power Supply: 2.7V to 5.5V; (23)Industrial Temperature Range (-40 to +85℃); (24)Packages: PLCC44, VQFP44, PLCC68, VQFP64.

Diagrams