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T89C51AC2 Datasheet(PDF) 1 Page - ATMEL Corporation |
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T89C51AC2 Datasheet(HTML) 1 Page - ATMEL Corporation |
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1 / 117 page  Draft.A- March 30, 2001 1 Preview - Confidential T89C51AC2 8-bit MCU with 32K bytes Flash, 10 bits A/D and EEPROM 1. Description The T89C51AC2 is a high performance CMOS FLASH version of the 80C51 CMOS single chip 8-bit microcontrollers. It contains a 32Kbytes Flash memory block for program and data. The 16K bytes or 32K bytes 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 80C52 with 256 bytes of internal RAM, a 7-source 4-level interrupt controller and three timer/counters. In addition, the T89C51AC2 has a 10 bits A/D converter, a 2Kbytes Boot Flash Memory, 2 Kbytes EEPROM for data, a Programmable Counter Array, an XRAM of 1024 byte, a Hardware Watchdog Timer and a more versatile serial channel that facilitates multiprocessor communication (EUART). The fully static design of the T89C51AC2 allows to reduce system power consumption by bringing the clock frequency down to any value, even DC, without loss of data. The T89C51AC2 has 2 software-selectable modes of reduced activity and 8 bit clock prescaler for further reduction in power consumption. In the Idle mode the CPU is frozen while the peripherals and the interrupt system are still operating. In the power-down mode the RAM is saved and all other functions are inoperative. The added features of the T89C51AC2 make it more powerful for applications that need A/D conversion, pulse width modulation, high speed I/O and counting capabilities such as industrial control, consumer goods, alarms, motor control, ... While remaining fully compatible with the 80C51 it offers a superset of this standard microcontroller. In X2 mode a maximum external clock rate of 20 MHz reaches a 300 ns cycle time. 2. Features • 80C51 core architecture: • 256 bytes of on-chip RAM • 1Kbytes of on-chip XRAM • 32 Kbytes of on-chip Flash memory • 2 Kbytes of on-chip Flash for Bootloader • 2 Kbytes of on-chip EEPROM • 14-source 4-level interrupt • Three 16-bit timer/counter • Full duplex UART compatible 80C51 • maximum crystal frequency 40 MHz. In X2 mode, 20 MHz (CPU core, 40 MHz) • Five ports: 32 + 2 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 (including 7 programmable bits) • A 10-bit resolution analog to digital converter (ADC) with 8 multiplexed inputs • 20 microsecond conversion time • Two conversion modes • On-chip emulation Logic (enhanced Hook system) • Power saving modes: • Idle mode • Power down mode • Power supply: 5V +/- 10% (or 3V** +/- 10%) • Temperature range: Industrial (-40 to +85C) • Packages: TQFP44, PLCC44 |
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