High Performance 8 bit Microcontroller with 12K Bytes Flash AT89S53-24PC
small scale integrated circuits
,integrated components
8-bit Microcontroller with 12K Bytes Flash
Features
• Compatible with MCS-51™ Products
• 12K Bytes of In-System Reprogrammable Downloadable Flash Memory
– SPI Serial Interface for Program Downloading
– Endurance: 1,000 Write/Erase Cycles
• 4V to 6V Operating Range
• Fully Static Operation: 0 Hz to 24 MHz
• Three-level Program Memory Lock
• 256 x 8-bit Internal RAM
• 32 Programmable I/O Lines
• Three 16-bit Timer/Counters
• Nine Interrupt Sources Programmable UART Serial Channel
• SPI Serial Interface
• Low-power Idle and Power-down Modes
• Interrupt Recovery From Power-down
• Programmable Watchdog Timer
• Dual Data Pointer
• Power-off Flag
Description
The AT89S53 is a low-power, high-performance CMOS 8-bit microcomputer with 12K bytes of downloadable Flash programmable and erasable read only 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 onchip downloadable Flash allows the program memory to be reprogrammed in-system through an SPI serial interface or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with downloadable Flash on a monolithic chip, the Atmel AT89S53 is a powerful microcomputer which provides a highly-flexible and cost-effective solution to many embedded control applications.
| WDT Prescaler Bits | Period (nominal) | ||
| PS2 | PS1 | PS0 | |
| 0 | 0 | 0 | 16 ms |
| 0 | 0 | 1 | 32 ms |
| 0 | 1 | 0 | 64 ms |
| 0 | 1 | 1 | 128 ms |
Timer 2 Auto Reload Mode (DCEN = 1)
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