ATMEGA32U4-MUR Atmel, ATMEGA32U4-MUR Datasheet - Page 430

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

Specifications of ATMEGA32U4-MUR

• 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-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

vi
ATmega16/32U4
25 JTAG Interface and On-chip Debug System ..................................... 314
26 IEEE 1149.1 (JTAG) Boundary-scan ................................................... 320
27 Boot Loader Support – Read-While-Write Self-Programming ......... 330
28 Memory Programming ......................................................................... 346
24.8ADC Conversion Result ......................................................................................305
24.9ADC Register Description ...................................................................................307
25.1Overview .............................................................................................................314
25.2Test Access Port – TAP ......................................................................................314
25.3TAP Controller .....................................................................................................316
25.4Using the Boundary-scan Chain ..........................................................................317
25.5Using the On-chip Debug System .......................................................................317
25.6On-chip Debug Specific JTAG Instructions .........................................................318
25.7On-chip Debug Related Register in I/O Memory .................................................319
25.8Using the JTAG Programming Capabilities .........................................................319
25.9Bibliography .........................................................................................................319
26.1Features ..............................................................................................................320
26.2System Overview ................................................................................................320
26.3Data Registers .....................................................................................................320
26.4Boundary-scan Specific JTAG Instructions .........................................................322
26.5Boundary-scan Related Register in I/O Memory .................................................323
26.6Boundary-scan Chain ..........................................................................................324
26.7ATmega16U4/ATmega32U4 Boundary-scan Order ............................................327
26.8Boundary-scan Description Language Files ........................................................329
27.1Boot Loader Features ..........................................................................................330
27.2Application and Boot Loader Flash Sections .......................................................330
27.3Read-While-Write and No Read-While-Write Flash Sections ..............................330
27.4Boot Loader Lock Bits .........................................................................................333
27.5Entering the Boot Loader Program ......................................................................334
27.6Addressing the Flash During Self-Programming .................................................337
27.7Self-Programming the Flash ................................................................................338
28.1Program And Data Memory Lock Bits .................................................................346
28.2Fuse Bits .............................................................................................................347
28.3Signature Bytes ...................................................................................................349
28.4Calibration Byte ...................................................................................................349
28.5Parallel Programming Parameters, Pin Mapping, and Commands .....................349
7766F–AVR–11/10