AT90S8515

2

Block Diagram

Figure 1. The AT90S8515 Block Diagram

The AT90S8515 provides the following features: 8K bytes

of In-System Programmable Flash, 512 bytes EEPROM,

512 bytes SRAM, 32 general purpose I/O lines, 32 general

purpose working registers, flexible timer/counters with

compare modes, internal and external interrupts, a pro-

grammable serial UART, programmable Watchdog Timer

with internal oscillator, an SPI serial port and two software

selectable power saving modes. The Idle Mode stops the

CPU while allowing the SRAM, timer/counters, SPI port

and interrupt system to continue functioning. The power

down mode saves the register contents but freezes the

oscillator, disabling all other chip functions until the next

interrupt or hardware reset.

The device is manufactured using Atmel’s high density

non-volatile memory technology. The on-chip in-system

programmable Flash allows the program memory to be

reprogrammed in-system through an SPI serial interface or

by a conventional nonvolatile memory programmer. By

combining an enhanced RISC 8-bit CPU with In-System

Programmable Flash on a monolithic chip, the Atmel

AT90S8515 is a powerful microcontroller that provides a

highly flexible and cost effective solution to many embed-

ded control applications.

The AT90S8515 AVR is supported with a full suite of pro-

gram and system development tools including: C compil-

ers, macro assemblers, program debugger/simulators, in-

circuit emulators, and evaluation kits.