ATMEGA64A-MNR Atmel, ATMEGA64A-MNR Datasheet - Page 260

• Manufacturer Part Number: ATMEGA64A-MNR
• Description: IC MCU AVR 64K FLASH 8QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA64A-MNR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: SPI, UART, I2C
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 53
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Operating Temperature Range: - 40 C to + 85 C
• Processor To Be Evaluated: ATMEGA64A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

25.3.1
25.3.2
25.3.2.1
25.3.2.2
25.3.2.3
25.3.3
8160C–AVR–07/09
Bypass Register
Device Identification Register
Reset Register
Version
Part Number
Manufacturer ID
The Bypass Register consists of a single Shift Register stage. When the Bypass Register is
selected as path between TDI and TDO, the register is reset to 0 when leaving the Capture-DR
controller state. The Bypass Register can be used to shorten the scan chain on a system when
the other devices are to be tested.
Figure 25-1
Figure 25-1. The Format of the Device Identification Register
Version is a 4-bit number identifying the revision of the component. The JTAG version number
follows the revision of the device. Revision A is 0x0, revision B is 0x1 and so on.
The part number is a 16-bit code identifying the component. The JTAG Part Number for
ATmega64A is listed in
Table 25-1.
The Manufacturer ID is a 11-bit code identifying the manufacturer. The JTAG manufacturer ID
for Atmel is listed in
Table 25-2.
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
latched, so the reset will take place immediately, as shown in
Bit
Device ID
Part Number
ATmega64A
Manufacturer
Atmel
shows the structure of the Device Identification Register.
AVR JTAG Part Number
Manufacturer ID
MSB
31
38) after releasing the Reset Register. The output from this data register is not
Version
4 bits
Table
Table
28
25-2.
25-1.
27
Part Number
16 bits
12
11
JTAG Part Number (Hex)
Figure
Manufacturer ID
JTAG Man. ID (Hex)
11 bits
0x9602
25-2.
0x01F
ATmega64A
1
LSB
1-bit
“Clock
1
0
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