ATMEGA32U4-AUR Atmel, ATMEGA32U4-AUR Datasheet - Page 20

• Manufacturer Part Number: ATMEGA32U4-AUR
• Description: MCU AVR 16K FLASH 16MHZ 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA32U4-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 26
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2.5K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

5.2.1
7766F–AVR–11/10
Data Memory Access Times
The Indirect with Displacement mode reaches 63 address locations from the base address given
by the Y- or Z-register.
When using register indirect addressing modes with automatic pre-decrement and post-incre-
ment, the address registers X, Y, and Z are decremented or incremented.
The 32 general purpose working registers, 64 I/O registers, and the 1.25/2.5Kbytes of internal
data SRAM in the ATmega16U4/ATmega32U4 are all accessible through all these addressing
modes. The Register File is described in
Figure 5-2.
This section describes the general access timing concepts for internal memory access. The
internal data SRAM access is performed in two clk
Figure 5-3.
Address
clk
Data Memory Map
On-chip Data SRAM Access Cycles
Data
Data
WR
CPU
RD
64 I/O
D ata M emory
160 E xt I/O
I nternal S RAM
32 R egisters
Compute Address
R egisters
T1
Memory Access Instruction
R eg .
“General Purpose Register File” on page
$FFFF
$0000 - $001F
$0020 - $005F
$0060 - $00FF
ISRAM start : $0100
Address valid
ISRAM end : $05FF / $0AFF
CPU
T2
cycles as described in
ATmega16/32U4
Next Instruction
T3
Figure
12.
5-3.
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