ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 270
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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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26.8
26.9
7799D–AVR–11/10
Hardware Boot EntranceTiming Characteristics
Parallel Programming Characteristics
Table 26-7.
Figure 26-4. Hardware Boot Timing Requirements
Table 26-8.
Figure 26-5. Parallel Programming Timing, Including some General Timing Requirements
Symbol
tSHRH
tHHRH
(Data Output)
(DATA, XA0/1, BS1, BS2)
(Data Input)
(CPOL = 0)
(CPOL = 1)
MOSI
MISO
SCK
SCK
Parameter
HWB low Setup before Reset High
HWB low Hold after Reset High
SS
ALE/HWB
Data & Contol
SPI Interface Timing Requirements (Slave Mode)
Hardware Boot Timings
RESET
RDY/BSY
PAGEL
XTAL1
9
WR
13
MSB
MSB
14
t
t
BVPH
DVXH
15
t
t
t
XHXL
PHPL
SHRH
t
t
t
t
XLDX
XLWL
PLBX
PLWL
...
...
ATmega8U2/16U2/32U2
t
BVWL
t
WLWH
Time Out Delay(TOUT)
WLRL
StartUpTime(SUT) +
11
Min
10
t
0
HHRH
LSB
LSB
t
WLBX
11
12
16
t
X
WLRH
17
Max
270
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