ATXMEGA64A1-C7U Atmel, ATXMEGA64A1-C7U Datasheet - Page 13

• Manufacturer Part Number: ATXMEGA64A1-C7U
• Description: IC MCU AVR 64KB FLASH 100VFBGA
• Manufacturer: Atmel
• Series: AVR® XMEGAr

Specifications of ATXMEGA64A1-C7U

• Core Processor: AVR
• Core Size: 8/16-Bit
• Speed: 32MHz
• Connectivity: EBI/EMI, I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 78
• 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): 1.6 V ~ 3.6 V
• Data Converters: A/D 16x12b, D/A 4x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-VFBGA
• Processor Series: XMEGA
• Core: AVR
• Data Bus Width: 8 bit, 16 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, TWI, USART
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 78
• Number Of Timers: 8
• Operating Supply Voltage: 2.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7.4.4
8067M–AVR–09/10
EBI - External Bus Interface
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The External Bus Interface (EBI) is the interface for connecting external peripheral and memory
to the data memory space. The XMEGA A1 has 3 ports that can be used for the EBI. It can inter-
face external SRAM, SDRAM, and/or peripherals such as LCD displays and other memory
mapped devices.
The address space, and the number of pins used, for the external memory is selectable from
256 bytes (8-bit) and up to 16M bytes (24-bit). Various multiplexing modes for address and data
lines can be selected for optimal use of pins when more or less pins is available for the EBI.
Each of the four chip selects has seperate configuration, and can be configured for SRAM,
SRAM Low Pin Count (LPC) or SDRAM. The data memory address space associated for each
chip select is decided by a configurable base address and address size for each chip celect.
For SDRAM both 4-bit SDRAM is supported, and SDRAM configurations such as CAS Latency
and Refresh rate is configurable in software.
The EBI is clocked from the Peripheral 2x Clock, running up to two times faster than the CPU
and supporting speeds of up to 64 MHz.
Supports SRAM up to
Supports SDRAM up to
Four software configurable Chip Selects
Software configurable Wait State insertion
Clocked from the Peripheral 2x Clock at up to two times the CPU clock speed
– 512K Bytes using 2-port EBI
– 16M Bytes using 3-port EBI
– 128M bit using 3-port EBI
XMEGA A1
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