ATMEGA128-16AI Atmel, ATMEGA128-16AI Datasheet - Page 332

• Manufacturer Part Number: ATMEGA128-16AI
• Description: IC AVR MCU 128K 16MHZ 64-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA128-16AI

• 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): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• For Use With: ATSTK501 - ADAPTER KIT FOR 64PIN AVR MCU
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Q1167170A

332
ATmega128
Figure 159. External Memory Timing (SRWn1 = 1, SRWn0 = 0)
Figure 160. External Memory Timing (SRWn1 = 1, SRWn0 = 1)
Note:
System Clock (CLK
System Clock (CLK
DA7:0 (XMBK = 0)
DA7:0 (XMBK = 0)
1. The ALE pulse in the last period (T4-T7) is only present if the next instruction accesses the
RAM (internal or external).
DA7:0
A15:8
CPU
ALE
WR
RD
DA7:0
A15:8
CPU
ALE
)
WR
RD
Prev. addr.
Prev. data
)
Prev. addr.
Prev. data
T1
T1
1
Address
Address
4
2
5
1
T2
6
Address
Address
3a
3b
4
2
XX
7
8
5
T2
6
13
3a
3b
XX
10
7
8
13
T3
10
T3
Address
Data
12
Data
16
15
9
T4
Data
Address
12
Data
16
15
T4
9
T5
(1)
11
T5
T6
11
14
T6
14
T7
2467V–AVR–02/11