ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 239
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ATmega32U2
Manufacturer Part Number
ATmega32U2
Description
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
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23.8.14
In
Table 23-8.
(Page size = 64 words = 128 bytes)
Note:
Table 23-9.
Note:
Table 23-10. 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 23-8
“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.
ATmega8U2 Boot Loader Parameters
Write Section” on page
256 words
512 words
1024 words
2048 words
through
Boot Size Configuration
Read-While-Write Limit
Table
PC[12:6]
PC[5:0]
12
23-10, the parameters used in the description of the Self-Programming are given.
5
4
8
16
32
227.
(1)
(1)
(Word Addresses)
0x0000 - 0xEFF
0x0000 - 0xDFF
0x0000 - 0xBFF
0x0000 - 0x7FF
Corresponding
“NRWW – No Read-While-Write Section” on page 227
Z-value
Z13:Z7
Z6:Z1
Z13
Z6
Figure 23-4
Figure
0xF00 - 0xFFF
0xE00 - 0xFFF
0xC00 - 0xFFF
0x800 - 0xFFF
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)
32
32
ATmega8U2/16U2/32U2
0xEFF
0xDFF
0xBFF
0x7FF
Address
0x0000 - 0x07FF
0x0800 - 0x0FFF
and
“RWW – Read-While-
0xF00
0xE00
0xC00
0x800
239
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