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AT90S8515 Datasheet(PDF) 5 Page - ATMEL Corporation

Part No. AT90S8515
Description  8-Bit Microcontroller with 8K bytes In-System Programmable Flash
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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AT90S8515
5
ize the SP in the reset routine (before subroutines or inter-
rupts are executed). The 16-bit stack pointer SP is
read/write accessible in the I/O space.
The 512 bytes data SRAM can be easily accessed through
the five different addressing modes supported in the AVR
architecture.
The memory spaces in the AVR architecture are all linear
and regular memory maps.
A flexible interrupt module has its control registers in the
I/O space with an additional global interrupt enable bit in
the status register. All the different interrupts have a sepa-
rate interrupt vector in the interrupt vector table at the
beginning of the program memory. The different interrupts
have priority in accordance with their interrupt vector posi-
tion. The lower the interrupt vector address the higher the
priority.
Figure 5. Memory Maps




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