ATMEGA649A-AU Atmel, ATMEGA649A-AU Datasheet - Page 273

• Manufacturer Part Number: ATMEGA649A-AU
• Description: IC MCU AVR 64K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA649A-AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 54
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

25.6
8284A–AVR–10/10
ATmega169A/169PA/329A/329PA/3290A/3290PA/649A/649P/6490A/6490P Boundary-scan
Order
Table 25-7 on page 279
TDO when the Boundary-scan chain is selected as data path. Bit 0 is the LSB; the first bit
scanned in, and the first bit scanned out. The scan order follows the pin-out order as far as pos-
sible. Therefore, the bits of Port A is scanned in the opposite bit order of the other ports.
Exceptions from the rules are the Scan chains for the analog circuits, which constitute the most
significant bits of the scan chain regardless of which physical pin they are connected to. In
ure 25-2 on page
PXn. Pull-up_enable corresponds to FF2. Bit 4, 5, 6 and 7 of Port F is not in the scan chain,
since these pins constitute the TAP pins when the JTAG is enabled...
Table 25-6.
Bit Number
197
196
195
194
ATmega169A/169PA/329A/329PA/649A/649P/3290A/3290PA/6490A/6490P
ATmega169A/169PA Boundary-scan Order
Signal Name
AC_IDLE
ACO
ACME
AINBG
265, PXn. Data corresponds to FF0, PXn. Control corresponds to FF1, and
and
Table 25-8 on page 286
Module
Comparator
shows the Scan order between TDI and
Fig-
273