ATMEGA128A-AN Atmel, ATMEGA128A-AN Datasheet - Page 26

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

Specifications of ATMEGA128A-AN

• 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

8151H–AVR–02/11
Note:
Figure 7-7.
Note:
Figure 7-8.
Note:
System Clock (CLK
System Clock (CLK
DA7:0 (XMBK = 0)
DA7:0 (XMBK = 1)
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
1. SRWn1 = SRW11 (upper sector) or SRW01 (lower sector), SRWn0 = SRW10 (upper sector) or
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).
SRW00 (lower sector).
The ALE pulse in period T6 is only present if the next instruction accesses the RAM (internal
or external).
DA7:0
A15:8
External Data Memory Cycles with SRWn1 = 0 and SRWn0 = 1
External Data Memory Cycles with SRWn1 = 1 and SRWn0 = 0
CPU
ALE
WR
RD
DA7:0
A15:8
)
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
XX
Address
T2
XX
Address
T3
Data
Data
Data
Address
T3
Data
Data
Data
T4
T4
T5
ATmega128A
T5
(1)
(1)
T6
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