ATMEGA128A-ANR Atmel, ATMEGA128A-ANR Datasheet - Page 257

• Manufacturer Part Number: ATMEGA128A-ANR
• Description: IC MCU AVR 128K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA128A-ANR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP
• Core: AVR8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

24.11.2.2
24.11.2.3
24.11.3
24.11.4
8151H–AVR–02/11
Reset Register
Boundary-scan Chain
Part Number
Manufacturer ID
The part number is a 16-bit code identifying the component. The JTAG Part Number for
ATmega128A is listed in
Table 24-1.
The Manufacturer ID is a 11-bit code identifying the manufacturer. The JTAG manufacturer ID
for ATMEL is listed in
Table 24-2.
The Reset Register is a Test Data Register used to reset the part. Since the AVR tri-states Port
Pins when reset, the Reset Register can also replace the function of the unimplemented optional
JTAG instruction HIGHZ.
A high value in the Reset Register corresponds to pulling the External Reset low. The part is
reset as long as there is a high value present in the Reset Register. Depending on the Fuse set-
tings for the clock options, the part will remain reset for a Reset Time-Out Period (refer to
Sources” on page
not latched, so the Reset will take place immediately, as shown in
Figure 24-4. Reset Register
The Boundary-scan Chain has the capability of driving and observing the logic levels on the dig-
ital I/O pins, as well as the boundary between digital and analog logic for analog circuitry having
off-chip connections. See
Part Number
ATmega128A
Manufacturer
ATMEL
From Other Internal and
External Reset Sources
AVR JTAG Part Number
Manufacturer ID
39) after releasing the Reset Register. The output from this Data Register is
Table
From
ClockDR · AVR_RESET
Table
TDI
“Boundary-scan Chain” on page 259
24-2.
24-1.
D
Q
TDO
To
JTAG Manufacturer ID (Hex)
JTAG Part Number (Hex)
for a complete description.
0x9702
0x01F
Figure
ATmega128A
24-4.
Internal Reset
“Clock
257