Harald: Created page with "{| |width="50%"| {| |width="100%"| |} |width="50%"| {| |width="100%"| |} |- | | {| |width="100%"| = Ethernut 1.3 Memory Map = The ATmega128 used on Ethernut 1.3 is a member o..."

2017-07-13T16:24:42Z

Created page with "{| |width="50%"| {| |width="100%"| |} |width="50%"| {| |width="100%"| |} |- | | {| |width="100%"| = Ethernut 1.3 Memory Map = The ATmega128 used on Ethernut 1.3 is a member o..."

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= Ethernut 1.3 Memory Map =

The ATmega128 used on Ethernut 1.3 is a member of the AVR family of microcontrollers, which are Harvard Architecture Machine, where program code and data are stored separately.

== Data Memory ==

{| class="wikitable"
! Address
! Description
|-
| 0x0000 - 0x001F
| CPU Registers (Note 1)
|-
| 0x0020 - 0x005F
| I/O Registers (Note 1)
|-
| 0x0060 - 0x00FF
| Extended I/O Registers (Note 1)
|-
| 0x0100 - 0x10FF
| Fast Internal RAM, no wait states required
|-
| 0x1100 - 0x7FFF
| External RAM, 1 wait state is recommended
|-
| 0x8000 - 0x82FF
| Unused, Available for Custom Extensions
|-
| 0x8300 - 0x831F
| Ethernet Controller Registers (Note 2)
|-
| 0x8320 - 0xFFFF
| Unused, Available for Custom Extensions
|}

 

'''Note 1''': See ATmega128 datasheet 
'''Note 2''': See RTL8019AS datasheet

== Program Memory ==

{| class="wikitable"
! Word Address
! Description
|-
| 0x0000 - 0x0045
| Vector Table
|-
| 0x0046 - 0xEFFF
| Initialization, RTOS and Application Sections
|-
| 0xF000 - 0xF7FF
| Bootloader Section, if BOOTSZ = 00b (Note 1)
|-
| 0xF800 - 0xFBFF
| Bootloader Section, if BOOTSZ = 01b (Note 1)
|-
| 0xFC00 - 0xFDFF
| Bootloader Section, if BOOTSZ = 10b (Note 1)
|-
| 0xFE00 - 0xF7FF
| Bootloader Section, if BOOTSZ = 11b (Note 1)
|}

 

'''Note 1''': Available for applications if not used by bootloader.

 
 
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Hardware/Enut1/Memmap - Revision history

Harald: Created page with "{| |width="50%"| {| |width="100%"| |} |width="50%"| {| |width="100%"| |} |- | | {| |width="100%"| = Ethernut 1.3 Memory Map = The ATmega128 used on Ethernut 1.3 is a member o..."