8-bit Microcontroller. AT89C51AC2 Datasheet

AT89C51AC2 Datasheet PDF, Equivalent


Part Number

AT89C51AC2

Description

Enhanced 8-bit Microcontroller

Manufacture

ATMEL Corporation

Total Page 30 Pages
PDF Download
Download AT89C51AC2 Datasheet


AT89C51AC2 Datasheet
Features
80C51 Core Architecture
256 Bytes of On-chip RAM
1 KB of On-chip XRAM
32 KB of On-chip Flash Memory
– Data Retention: 10 Years at 85°C
Read/Write Cycle: 10K
2 KB of On-chip Flash for Bootloader
2 KB of On-chip EEPROM
Read/Write Cycle: 100K
14-sources 4-level Interrupts
Three 16-bit Timers/Counters
Full Duplex UART Compatible 80C51
Maximum Crystal Frequency 40 MHz, in X2 Mode, 20 MHz (CPU Core, 20 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 (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
Power Supply: 3V to 5.5V
Temperature Range: Industrial (-40° to +85°C)
Packages: VQFP44, PLCC44
Description
The A/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 A/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
A/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 A/T89C51AC2 reduces system
power consumption by bringing the clock frequency down to any value, even DC,
without loss of data.
The A/T89C51AC2 has two software-selectable modes of reduced activity and an 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 A/T89C51AC2 make it more powerful for applications that
need A/D conversion, pulse width modulation, high speed I/O and counting capabili-
ties such as industrial control, consumer goods, alarms, motor control, among others.
While remaining fully compatible with the 80C52, the T8C51AC2 offers a superset of
this standard microcontroller. In X2 mode, a maximum external clock rate of 20 MHz
reaches a 300 ns cycle time.
Enhanced 8-bit
Microcontroller
with 32 KB Flash
Memory
AT89C51AC2
T89C51AC2
Rev. 4127H–8051–02/08
1

AT89C51AC2 Datasheet
Block Diagram
XTAL1
XTAL2
ALE
PSEN
EA
RD
WR
CPU
UART
RAM
256x8
Flash Boot EE XRAM
32kx loader PROM 1kx8
8 2kx8 2kx8
C51
CORE
IB-bus
PCA Timer 2
Timer 0
Timer 1
INT
Ctrl
Parallel I/O Ports and Ext. Bus Watch
Dog
Port 0 Port 1 Port 2 Port 3 Port 4
10 bit
ADC
Notes: 1. 8 analog Inputs/8 Digital I/O
2. 2-Bit I/O Port
2 A/T89C51AC2
4127H–8051–02/08


Features Datasheet pdf Features • 80C51 Core Architecture • 256 Bytes of On-chip RAM • 1 KB of O n-chip XRAM • 32 KB of On-chip Flash Memory – Data Retention: 10 Years at 85°C Read/Write Cycle: 10K • 2 KB of On-chip Flash for Bootloader • 2 KB of On-chip EEPROM Read/Write Cycle: 100 K • 14-sources 4-level Interrupts • Three 16-bit Timers/Counters • Full Duplex UART Compatible 80C51 • Maximu m Crystal Frequency 40 MHz, in X2 Mode, 20 MHz (CPU Core, 20 MHz) • Five Por ts: 32 + 2 Digital I/O Lines • Five-c hannel 16-bit PCA with: – PWM (8-bit) – High-speed Output – Timer and Ed ge Capture • Double Data Pointer • 21-bit Watchdog Timer (7 Programmable B its) • 10-bit Resolution Analog to Di gital Converter (ADC) with 8 Multiplexe d Inputs • On-chip Emulation Logic (E nhanced Hook System) • Power Saving M odes: – Idle Mode – Power-down Mode • Power Supply: 3V to 5.5V • Tempe rature Range: Industrial (-40° to +85 C) • Packages: VQFP44, PLCC44 Description The A/T89C51AC2 is a high performance Flash version of the 80C51 single c.
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