Features
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Compatible with MCS
®
-51 Products
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12K Bytes of In-System Programmable (ISP) Flash Program Memory
– SPI Serial Interface for Program Downloading
– Endurance: 10,000 Write/Erase Cycles
2K Bytes EEPROM Data Memory
– Endurance: 100,000 Write/Erase Cycles
64-byte User Signature Array
2.7V to 5.5V 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
Enhanced UART Serial Port with Framing Error Detection and Automatic
Address Recognition
Enhanced SPI (Double Write/Read Buffered) Serial Interface
Low-power Idle and Power-down Modes
Interrupt Recovery from Power-down Mode
Programmable Watchdog Timer
Dual Data Pointer
Power-off Flag
Flexible ISP Programming (Byte and Page Modes)
– Page Mode: 64 Bytes/Page for Code Memory, 32 Bytes/Page for Data Memory
Four-level Enhanced Interrupt Controller
Programmable and Fuseable x2 Clock Option
Internal Power-on Reset
42-pin PDIP Package Option for Reduced EMC Emission
Green (Pb/Halide-free) Packaging Option
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8-bit
Microcontroller
with 12K Bytes
Flash and 2K
Bytes EEPROM
AT89S8253
1. Description
The AT89S8253 is a low-power, high-performance CMOS 8-bit microcontroller with
12K bytes of In-System Programmable (ISP) Flash program memory and 2K bytes of
EEPROM data memory. The device is manufactured using Atmel’s high-density non-
volatile memory technology and is compatible with the industry-standard MCS-51
instruction set and pinout. The on-chip downloadable Flash allows the program mem-
ory 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 AT89S8253 is a powerful
microcontroller which provides a highly-flexible and cost-effective solution to many
embedded control applications.
3286H–MICRO–9/05
ATMEL [ ATMEL CORPORATION ]
