ATmega32U4 Atmel Corporation, ATmega32U4 Datasheet - Page 384

• Manufacturer Part Number: ATmega32U4
• Manufacturer: Atmel Corporation

Specifications of ATmega32U4

• Flash (kbytes): 32 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): 3.3
• 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: 4
• Output Compare Channels: 12
• Input Capture Channels: 2
• Pwm Channels: 8
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

29.8
Table 29-5.
7766F–AVR–11/10
TUE
Symbol
Hardware Boot EntranceTiming Characteristics
Parameter
Resolution
Absolute accuracy
ADC Characteristics
Figure 29-5. SPI Interface Timing Requirements (Slave Mode)
Figure 29-6. Hardware Boot Timing Requirements
Table 29-4.
Symbol
tSHRH
tHHRH
(Data Output)
(Data Input)
(CPOL = 0)
(CPOL = 1)
MOSI
MISO
Parameter
HWB low Setup before Reset High
HWB low Hold after Reset High
SCK
SCK
SS
Condition
Single Ended Conversion
Differential conversion, gain = 1x/10x/40x
Differential conversion, gain = 200x
V
Gain = 1x/10x/40x, V
ADC clock = 200 kHz
Gain = 200x, V
ADC clock = 200 kHz
ALE/HWB
Hardware Boot Timings
REF
RESET
= 4V, V
9
13
CC
REF
= 4V, ADC clock = 200 kHz
MSB
MSB
= 4V, V
14
REF
= 4V, V
15
CC
t
= 5V,
SHRH
CC
= 5V,
...
...
StartUpTime(
Delay(TOUT)
SUT) + Time
Min
Min
Out
0
11
ATmega16/32U4
Typ
2.0
2.0
2.0
10
10
t
8
8
HHRH
LSB
LSB
11
Max
12
Max
3.0
3.0
4.0
16
X
17
Units
LSB
Bits
384