ATMEGA64L-8MI View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA64L-8MI

8-bit AVR® Microcontroller with 64K Bytes In-System Programmable Flash

Atmel Corporation 

The five different addressing modes for the data memory cover: Direct, Indirect with Dis-

placement, Indirect, Indirect with Pre-decrement, and Indirect with Post-increment. In

the Register File, registers R26 to R31 feature the indirect addressing pointer registers.

The direct addressing reaches the entire data space.

The Indirect with Displacement mode reaches 63 address locations from the base

address given by the Y- or Z-register.

When using register indirect addressing modes with automatic pre-decrement and post-

increment, the address registers X, Y, and Z are decremented or incremented.

The 32 general purpose working registers, 64 I/O Registers, 160 extended I/O Regis-

ters, and the 4,096 bytes of internal data SRAM in the ATmega64 are all accessible

through all these addressing modes. The Register File is described in “General Purpose

Register File” on page 11.

Figure 9. Data Memory Map

Memory Configuration A

Memory Configuration B

Data Memory

32 Registers

64 I/O Registers

160 Ext I/O Reg.

Internal SRAM

(4096 x 8)

$0000 - $001F

$0020 - $005F

$0060 - $00FF

$0100

$10FF

$1100

External SRAM

(0 - 64K x 8)

Data Memory

32 Registers

64 I/O Registers

Internal SRAM

(4000 x 8)

$0000 - $001F

$0020 - $005F

$0060

$0FFF

$1000

External SRAM

(0 - 64K x 8)

$FFFF

$FFFF

18 ATmega64(L)

2490G–AVR–03/04

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