ATmega32U4 Atmel Corporation, ATmega32U4 Datasheet - Page 359

• 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

28.6.15
7766F–AVR–11/10
Parallel Programming Characteristics
Figure 28-7. Parallel Programming Timing, Including some General Timing Requirements
Figure 28-8. Parallel Programming Timing, Loading Sequence with Timing Requirements
Note:
Figure 28-9. Parallel Programming Timing, Reading Sequence (within the Same Page) with
XTAL1
DATA
PAGEL
(DATA, XA0/1, BS1, BS2)
XTAL1
BS1
XA0
XA1
DATA
OE
BS1
XA0
XA1
1. The timing requirements shown in
ing operation.
Data & Contol
Timing Requirements
RDY/BSY
ADDR0 (Low Byte)
LOAD ADDRESS
ADDR0 (Low Byte)
LOAD ADDRESS
PAGEL
(LOW BYTE)
XTAL1
(LOW BYTE)
WR
t
XLOL
t
OLDV
t
t
BVPH
DVXH
(1)
(LOW BYTE)
LOAD DATA
DATA (Low Byte)
t
t
XHXL
PHPL
DATA (Low Byte)
READ DATA
(LOW BYTE)
Figure 28-7
t
t
t
t
t
XLXH
XLDX
XLWL
PLBX
PLWL
t
BVDV
(i.e., t
t
BVWL
(HIGH BYTE)
LOAD DATA
DATA (High Byte)
DVXH
(HIGH BYTE)
READ DATA
t
DATA (High Byte)
WLWH
t
XLPH
WLRL
LOAD DATA
, t
XHXL
ATmega16/32U4
, and t
t
OHDZ
t
PLXH
t
WLBX
XLDX
LOAD ADDRESS
LOAD ADDRESS
(LOW BYTE)
(LOW BYTE)
) also apply to load-
ADDR1 (Low Byte)
ADDR1 (Low Byte)
t
WLRH
(1)
359