ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 240

• Manufacturer Part Number: ATmega32U2
• Manufacturer: Atmel Corporation

Specifications of ATmega32U2

• Flash (kbytes): 32 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 22
• Ext Interrupts: 20
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 1024
• 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: 2
• Output Compare Channels: 5
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

23.8.15
In
Table 23-11. Boot Size Configuration
(Page size = 64 words = 128 bytes)
Note:
Table 23-12. Read-While-Write Limit
Note:
Table 23-13. Explanation of different variables used in
Note:
See
Programming.
7799D–AVR–11/10
1
1
0
0
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Variable
PCMSB
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
Table 23-11
“Addressing the Flash During Self-Programming” on page 232
1
0
1
0
1. The different BOOTSZ Fuse configurations are shown in
1. For details about these two section, see
1. Z0: should be zero for all SPM commands, byte select for the (E)LPM instruction.
ATmega16U2 Boot Loader Parameters
Write Section” on page
256 words
512 words
1024 words
2048 words
through
Table
PC[12:6]
PC[5:0]
12
5
23-13, the parameters used in the description of the Self-Programming are given.
4
8
16
32
227.
(1)
(1)
(Word Addresses)
0x0000 - 0x1EFF
0x0000 - 0x1DFF
0x0000 - 0x1BFF
0x0000 - 0x17FF
Corresponding
“NRWW – No Read-While-Write Section” on page 227
Z-value
Z13:Z7
Z6:Z1
Z13
Z6
Figure 23-4
Figure
0x1F00 - 0x1FFF
0x1E00 - 0x1FFF
0x1C00 - 0x1FFF
0x1800 - 0x1FFF
Description
Most significant bit in the Program Counter. (The Program
Counter is 13 bits PC[12:0])
Most significant bit which is used to address the words within
one page (64 words in a page requires six bits PC [5:0]).
Bit in Z-pointer that is mapped to PCMSB. Because Z0 is not
used, the ZPCMSB equals PCMSB + 1.
Bit in Z-pointer that is mapped to PCMSB. Because Z0 is not
used, the ZPAGEMSB equals PAGEMSB + 1.
Program Counter page address: Page select, for Page Erase
and Page Write
Program Counter word address: Word select, for filling
temporary buffer (must be zero during Page Write operation)
and the mapping to the Z-pointer
23-2.
for details about the use of Z-pointer during Self-
Pages
(1)
96
32
ATmega8U2/16U2/32U2
0x1EFF
0x1DFF
0x1BFF
0x17FF
Address
0x0000 - 0x17FF
0x1800 - 0x1FFF
and
“RWW – Read-While-
0x1F00
0x1E00
0x1C00
0x1800
240