AT32UC3A3256AU Atmel Corporation, AT32UC3A3256AU Datasheet - Page 219

• Manufacturer Part Number: AT32UC3A3256AU
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A3256AU

• Flash (kbytes): 256 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

16.3
Figure 16-1. SDRAM Controller Block Diagram
16.4
32072G–11/2011
C o n tro lle r
M a n a g er
M e m o ry
P o w e r
Block Diagram
I/O Lines Description
C L K _ S D R A M C
C hip S e le ct
S D R A M C
S D R A M C
Inte rru p t
Table 16-1.
Name
SDCK
SDCKE
SDCS
BA[1:0]
RAS
CAS
SDWE
P e rip h e ra l B u s
S D R A M C
U se r Inte rface
I/O Lines Description
Description
SDRAM Clock
SDRAM Clock Enable
SDRAM Chip Select
Bank Select Signals
Row Signal
Column Signal
SDRAM Write Enable
S D R A M C _ A [1 2:1 1]
S D R A M C _A [9:0]
S D R A M C _ A [1 0]
D [15:0]
S D C K
S D C K E
B A [1 :0]
S D C S
D Q M [0]
D Q M [1]
R A S
C A S
S D W E
M U X L o gic
E B I
C o n tro lle r
Type
Output
Output
Output
Output
Output
Output
Output
I/O
Active Level
High
Low
Low
Low
Low
S D C K E
N C S [1]
A D D R [1 7:1 6]
C A S
R A S
S D W E
A D D R [1 1 :2 ]
S D A 1 0
A D D R [1 3:1 4]
A D D R [0 ]
D A T A [15:0 ]
S D C K
N W E 1
219