ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 270

• 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

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
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