atmega32u4-16mu ATMEL Corporation, atmega32u4-16mu Datasheet - Page 17

• Manufacturer Part Number: atmega32u4-16mu
• Description: Atmega32u4 8-bit Avr Microcontroller With 32k Bytes Of Isp Flash And Usb Controller
• Manufacturer: ATMEL Corporation

5. AVR ATmega32U4 Memories
5.1
7766A–AVR–03/08
In-System Reprogrammable Flash Program Memory
This section describes the different memories in the ATmega32U4. The AVR architecture has
two main memory spaces, the Data Memory and the Program Memory space. In addition, the
ATmega32U4 features an EEPROM Memory for data storage. All three memory spaces are lin-
ear and regular.
Table 5-1.
Notes:
The ATmega32U4 contains 32K bytes On-chip In-System Reprogrammable Flash memory for
program storage. Since all AVR instructions are 16 or 32 bits wide, the Flash is organized as
16K x 16. For software security, the Flash Program memory space is divided into two sections,
Boot Program section and Application Program section.
The Flash memory has an endurance of at least 100,000 write/erase cycles. The ATmega32U4
Program Counter (PC) is 16 bits wide, thus addressing the 32K program memory locations. The
operation of Boot Program section and associated Boot Lock bits for software protection are
Memory
Flash
32
Registers
I/O
Registers
Ext I/O
Registers
Internal
SRAM
External
Memory
EEPROM
1. Byte address.
2. Word (16-bit) address.
Size
Start Address
End Address
Size
Start Address
End Address
Size
Start Address
End Address
Size
Start Address
End Address
Size
Start Address
End Address
Size
Start Address
End Address
Memory Mapping.
Mnemonic
ISRAM start
ISRAM size
ISRAM end
Flash size
Flash end
Not Present.
0x0000
E2 size
E2 end
-
-
-
-
-
-
-
-
-
-
-
AT90USB324
2,5K bytes
32K bytes
160 bytes
0x7FFF
0x3FFF
1K bytes
32 bytes
64 bytes
0x0AFF
0x00FF
0x03FF
0x0000
0x001F
0x0020
0x005F
0x0060
(1)
(2)
ATmega32U4
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