AT32UC3A3128 Atmel Corporation, AT32UC3A3128 Datasheet - Page 61

• Manufacturer Part Number: AT32UC3A3128
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A3128

• Flash (kbytes): 128 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 66 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 110
• Ext Interrupts: 110
• Usb Transceiver: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device + OTG
• Spi: 6
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 16
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 128
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0 to 3.6
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 12
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

6. Memory System
6.1
32002F–03/2010
Memory sections
AVR32UC implements a 32-bit unsegmented memory space. Regions of this memory space
can be protected by an optional MPU. The memory map is as follows:
Figure 6-1.
The memory map contains four sections, named IRAM, LOCAL, BOOT and HSB. The IRAM
section contains the internal EX stage memory, and this memory is mapped from address 0 and
upwards. The LOCAL section is mapped from address 0x4000_0000 and is designed for con-
taining device-specific high-speed interfaces, such as floating-point units, encryption hardware
or high-speed GPIO ports. Access to the LOCAL space is performed using any ordinary load
and store instructions, and is performed in a single clock cycle. Mapping timing-critical devices in
the LOCAL section is beneficial as the interface operates with high clock frequency, and its tim-
ing is deterministic since it does not need to access a shared bus which may be heavily loaded.
The BOOT section starts at address 0x8000_0000, which is the reset address for AVR32UC.
This section will typically contain an internal program FLASH, mapped from address
0x8000_0000 and upwards. The HSB section contains the addresses of all modules mapped on
the HSB bus. This may include peripherals such as USARTs and external memory interfaces.
The memory space is uniform, so program code can execute from the IRAM, BOOT and HSB
sections, and data accesses can be performed to any of the these sections. Note that implemen-
tations of AVR32UC of may forbid certain accesses to certain memory sections, eg a write to
program FLASH mapped into the BOOT section may be forbidden. The LOCAL section is only
accessible by the Load-Store Unit in the CPU EX pipeline stage, therefore, code can not be exe-
cuted from addresses in the LOCAL space.
The AVR32UC memory map.
H'FFFFFFFF
H'C0000000
H'80000000
H'40000000
H'00000000
1 GB Internal Data RAM
1GB High Speed Bus
1GB CPU Local Bus
1GB Boot Program
Memory
Memory
space
BOOT
IRAM
HSB
LOCAL
AVR32
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