ATMEGA8515 Datasheet, PDF (17/254 Pages) ATMEL Corporation – 8-bit AVR Microcontroller with 8K Bytes In-System Programmable Flash

ATmega8515(L)
Figure 9. Data Memory Map
Data Memory
32 Registers
64 I/O Registers
Internal SRAM
(512 x 8)
$0000 - $001F
$0020 - $005F
$0060
$025F
$0260
External SRAM
(0 - 64K x 8)
$FFFF
Data Memory Access Times
This section describes the general access timing concepts for internal memory access.
The internal data SRAM access is performed in two clk_CPU cycles as described in Figure
10.
Figure 10. On-chip Data SRAM Access Cycles
T1
T2
T3
clk
CPU
Address
Data
WR
Data
RD
Compute Address
Address Valid
Memory Access Instruction
Next Instruction
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2512G–AVR–03/05