ATmega16U4 Atmel Corporation, ATmega16U4 Datasheet - Page 18

• Manufacturer Part Number: ATmega16U4
• Manufacturer: Atmel Corporation

Specifications of ATmega16U4

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 14
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 26
• Ext Interrupts: 13
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 2.1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 12
• Input Capture Channels: 2
• Pwm Channels: 8
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

5. AVR ATmega16U4/ATmega32U4 Memories
5.1
7766F–AVR–11/10
In-System Reprogrammable Flash Program Memory
This section describes the different memories in the ATmega16U4/ATmega32U4. The AVR
architecture has two main memory spaces, the Data Memory and the Program Memory space.
In addition, the ATmega16U4/ATmega32U4 features an EEPROM Memory for data storage. All
three memory spaces are linear and regular.
Table 5-1.
Notes:
The ATmega16U4/ATmega32U4 contains 16/32K 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
ATmega16U4/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 described in detail in
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
End Address
Memory Mapping.
Mnemonic
ISRAM start
ISRAM size
ISRAM end
Flash size
Flash end
0x0000
E2 size
E2 end
-
-
-
-
-
-
-
-
-
-
Not Present.
ATmega32U4
2,5K bytes
32K bytes
160 bytes
0x7FFF
0x3FFF
32 bytes
64 bytes
1K bytes
0x0AFF
0x00FF
0x03FF
0x0000
0x001F
0x0020
0x005F
0x0060
0x100
(1)
(2)
“Memory Programming” on page
ATmega16U4
1.25K bytes
ATmega16/32U4
16K bytes
160 bytes
512 bytes
0x3FFF
0x1FFF
32 bytes
64 bytes
0x00FF
0x05FF
0x01FF
0x0000
0x001F
0x0020
0x005F
0x0060
0x100
(1)
(2)
346.
18