AT89LS52 datasheet pdf

Features •Compatible with MCS ® -51

Products •8K Bytes of In-System Programmable (ISP) Flash Memory – Endurance: 10,000 Write/Erase Cycles •2.7V to 4.0V Operating Range •Fully Static Operation: 0 Hz to 16 MHz •Three-level Program Memory Lock •256 x 8-bit Internal RAM •32 Programmable I/O Lines •Three 16-bit Timer/Counters •Eight Interrupt Sources •Full Duplex UART Serial Channel •Low-power Idle and Power-down Modes •Interrupt Recovery from Power-down Mode •Watchdog Timer •Dual Data Pointer •Power-off Flag •Flexible ISP Programming (Byte and Page Modes) •Green (Pb/Halide-free) Packaging Option 1. Description The AT89LS52 is a low-voltage, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set and pinout. The on-chip Flash allows the pro- gram memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with in-system programma- ble Flash on a monolithic chip, the Atmel AT89LS52 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. The AT89LS52 provides the following standard features: 8K bytes of Flash, 256 bytes of RAM, 32 I/O lines, Watchdog timer, two data pointers, three 16-bit timer/counters, a six-vector two-level interrupt architecture, a full duplex serial port, on-chip oscillator, and clock circuitry. In addition, the AT89LS52 is designed with static logic for opera- tion 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 oscillator, disabling all other chip functions until the next external interrupt or hardware reset. 8-bit Low-Voltage Microcontroller with 8K Bytes In-System Programmable Flash AT 8 9 L S 5 2

Features

• •8K Bytes of In-System Programmable (ISP) Flash Memory
• •2.7V to 4.0V Operating Range
• •Fully Static Operation: 0 Hz to 16 MHz
• •Three-level Program Memory Lock
• •256 x 8-bit Internal RAM
• •32 Programmable I/O Lines
• •Three 16-bit Timer/Counters
• •Eight Interrupt Sources
• •Full Duplex UART Serial Channel
• •Low-power Idle and Power-down Modes
• •Interrupt Recovery from Power-down Mode
• •Watchdog Timer
• •Dual Data Pointer
• •Power-off Flag
• •Flexible ISP Programming (Byte and Page Modes)
• •Green (Pb/Halide-free) Packaging Option
• 1. Description