ATMEGA64A-MN Atmel, ATMEGA64A-MN Datasheet - Page 26

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

Specifications of ATMEGA64A-MN

• 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: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8160C–AVR–07/09
Note that the XMEM interface is asynchronous and that the waveforms in the following figures
are related to the internal system clock. The skew between the internal and external clock
(XTAL1) is not guaranteed (varies between devices, temperature, and supply voltage). Conse-
quently the XMEM interface is not suited for synchronous operation.
Figure 7-6.
Note:
Figure 7-7.
Note:
System Clock (CLK
System Clock (CLK
1. SRWn1 = SRW11 (upper sector) or SRW01 (lower sector), SRWn0 = SRW10 (upper sector) or
1. SRWn1 = SRW11 (upper sector) or SRW01 (lower sector), SRWn0 = SRW10 (upper sector) or
DA7:0 (XMBK = 0)
DA7:0 (XMBK = 1)
DA7:0 (XMBK = 0)
DA7:0 (XMBK = 1)
SRW00 (lower sector).
The ALE pulse in period T4 is only present if the next instruction accesses the RAM (internal
or external).
SRW00 (lower sector).
The ALE pulse in period T5 is only present if the next instruction accesses the RAM (internal
or external).
External Data Memory Cycles without Wait State
(SRWn1 = 0 and SRWn0 =0)
External Data Memory Cycles with SRWn1 = 0 and SRWn0 = 1
DA7:0
A15:8
CPU
ALE
DA7:0
WR
A15:8
RD
CPU
ALE
WR
)
RD
)
Prev. Addr.
Prev. Data
Prev. Data
Prev. Data
Prev. addr.
Prev. data
Prev. data
Prev. data
T1
T1
Address
Address
Address
T2
Address
Address
Address
XX
T2
XX
XXXXX
Address
T3
Data
Data
Data
Address
T3
Data
Data
Data
(1)
T4
ATmega64A
XXXXXXXX
T4
T5
(1)
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