ATMEGA128A-MU Atmel, ATMEGA128A-MU Datasheet - Page 23
ATMEGA128A-MU
Manufacturer Part Number
ATMEGA128A-MU
Description
MCU 8BIT 128K ISP FLASH 64-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA128A-MU
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-MLF®, 64-QFN
Processor Series
ATMEGA128x
Core
AVR8
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Controller Family/series
AVR MEGA
No. Of I/o's
53
Eeprom Memory Size
4KB
Ram Memory Size
4KB
Cpu Speed
16MHz
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
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Manufacturer
Quantity
Price
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Part Number:
ATMEGA128A-MU
Manufacturer:
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Quantity:
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Company:
Part Number:
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Manufacturer:
ATMEL
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7.5.3
7.5.4
8151H–AVR–02/11
ATmega103 Compatibility
Using the External Memory Interface
Figure 7-4.
Note:
Both External Memory Control Registers (XMCRA and XMCRB) are placed in Extended I/O
space. In ATmega103 compatibility mode, these registers are not available, and the features
selected by these registers are not available. The device is still ATmega103 compatible, as
these features did not exist in ATmega103. The limitations in ATmega103 compatibility mode
are:
The interface consists of:
• Only two wait-states settings are available (SRW1n = 0b00 and SRW1n = 0b01).
• The number of bits that are assigned to address high byte are fixed.
• The External Memory section can not be divided into sectors with different wait-state
• Bus-keeper is not available.
• RD, WR and ALE pins are output only (Port G in ATmega128A).
• AD7:0: Multiplexed low-order address bus and data bus.
• A15:8: High-order address bus (configurable number of bits).
• ALE: Address latch enable.
settings.
External Memory
Atmel
available (Memory Configuration B N/A)
ATmega128A in ATmega103 compatibility mode: Memory Configuration B is available (Memory
Configuration A N/A)
(0-60K x 8)
®
External Memory with Sector Select
AVR
®
Memory Configuration A
ATmega128A in non ATmega103 compatibility mode: Memory Configuration A is
Internal memory
Lower sector
Upper sector
SRW01
SRW00
SRW11
SRW10
0x0000
0x10FF
0x1100
0xFFFF
SRL[2..0]
External Memory
(0-60K x 8)
Memory Configuration B
Internal memory
SRW10
ATmega128A
0x0000
0x0FFF
0x1000
0xFFFF
23
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