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AT89S2051_08 Datasheet, PDF (1/46 Pages) ATMEL Corporation – 8-bit Microcontroller with 2K/4K Bytes Flash | |||
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Features
⢠Compatible with MCS®51 Products
⢠2K/4K Bytes of In-System Programmable (ISP) Flash Program Memory
â Serial Interface for Program Downloading
â Endurance: 10,000 Write/Erase Cycles
⢠2.7V to 5.5V Operating Range
⢠Fully Static Operation: 0 Hz to 24 MHz (x1 and x2 Modes)
⢠Two-level Program Memory Lock
⢠256 x 8-bit Internal RAM
⢠15 Programmable I/O Lines
⢠Two 16-bit Timer/Counters
⢠Six Interrupt Sources
⢠Programmable Serial UART Channel
⢠Direct LED Drive Outputs
⢠On-chip Analog Comparator with Selectable Interrupt
⢠8-bit PWM (Pulse-width Modulation)
⢠Low Power Idle and Power-down Modes
⢠Brownout Reset
⢠Enhanced UART Serial Port with Framing Error Detection and Automatic
Address Recognition
⢠Internal Power-on Reset
⢠Interrupt Recovery from Power-down Mode
⢠Programmable and Fuseable x2 Clock Option
⢠Four-level Enhanced Interrupt Controller
⢠Power-off Flag
⢠Flexible Programming (Byte and Page Modes)
â Page Mode: 32 Bytes/Page
⢠User Serviceable Signature Page (32 Bytes)
8-bit
Microcontroller
with 2K/4K
Bytes Flash
AT89S2051
AT89S4051
1. Description
The AT89S2051/S4051 is a low-voltage, high-performance CMOS 8-bit microcon-
troller with 2K/4K bytes of In-System Programmable (ISP) Flash program memory.
The device is manufactured using Atmelâs high-density nonvolatile memory technol-
ogy and is compatible with the industry-standard MCS-51 instruction set. By
combining a versatile 8-bit CPU with Flash on a monolithic chip, the Atmel
AT89S2051/S4051 is a powerful microcontroller which provides a highly-flexible and
cost-effective solution to many embedded control applications. Moreover, the
AT89S2051/S4051 is designed to be function compatible with the AT89C2051/C4051
devices, respectively.
The AT89S2051/S4051 provides the following standard features: 2K/4K bytes of
Flash, 256 bytes of RAM, 15 I/O lines, two 16-bit timer/counters, a six-vector, four-
level interrupt architecture, a full duplex enhanced serial port, a precision analog
comparator, on-chip and clock circuitry. Hardware support for PWM with 8-bit resolu-
tion and 8-bit prescaler is available by reconfiguring the two on-chip timer/counters. In
addition, the AT89S2051/S4051 is designed with static logic for operation down to
zero frequency and supports two software-selectable power saving modes. The Idle
Mode stops the CPU while allowing the RAM, timer/counters, serial port and interrupt
system to continue functioning. The power-down mode saves the RAM contents
but freezes the disabling all other chip functions until the next external interrupt or
hardware reset.
3390EâMICROâ6/08
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