AT32UC3A1256AU Atmel Corporation, AT32UC3A1256AU Datasheet - Page 400

• Manufacturer Part Number: AT32UC3A1256AU
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A1256AU

• Flash (kbytes): 256 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 66 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 69
• Ext Interrupts: 69
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device + OTG
• Spi: 6
• Twi (i2c): 1
• Uart: 4
• Ssc: 1
• Ethernet: 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): 64
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0-3.6 or (1.65-1.95+3.0-3.6)
• Operating Voltage (vcc): 3.0-3.6 or (1.65-1.95+3.0-3.6)
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 10
• Output Compare Channels: 16
• Input Capture Channels: 6
• Pwm Channels: 13
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

32058K AVR32-01/12
Figure 27-34. Recommended Procedure to Switch from Slow Clock Mode to Normal Mode or from Normal Mode to Slow
27.6.9
27.6.9.1
Internal signal from PM
Slow Clock Mode
NBS0, NBS1,
Asynchronous Page Mode
A0, A1
CLK_SMC
Protocol and Timings in Page Mode
A[25:2]
Clock Mode
NWE
NCS
The SMC supports asynchronous burst reads in page mode, providing that the page mode is
enabled in the MODE register (PMEN field). The page size must be configured in the MODE
register (PS field) to 4, 8, 16 or 32 bytes.
The page defines a set of consecutive bytes into memory. A 4-byte page (resp. 8-, 16-, 32-byte
page) is always aligned to 4-byte boundaries (resp. 8-, 16-, 32-byte boundaries) of memory. The
MSB of data address defines the address of the page in memory, the LSB of address define the
address of the data in the page as detailed in
With page mode memory devices, the first access to one page (t
quent accesses to the page (t
enables the user to define different read timings for the first access within one page, and next
accesses within the page.
Table 27-5.
Notes:
Figure 27-35
SLOW CLOCK MODE WRITE
Page Size
4 bytes
8 bytes
16 bytes
32 bytes
1
1. A denotes the address bus of the memory device
2. For 16-bit devices, the bit 0 of address is ignored. For 32-bit devices, bits [1:0] are ignored.
1
shows the NRD and NCS timings in page mode access.
Page Address and Data Address within a Page
Page Address
A[25:2]
A[25:3]
A[25:4]
A[25:5]
1
sa
) as shown in
(1)
IDLE STATE
Table
Figure
Reload Configuration
27-5.
Data Address in the Page
A[1:0]
A[2:0]
A[3:0]
A[4:0]
Wait State
27-35. When in page mode, the SMC
2
pa
NORMAL MODE WRITE
) takes longer than the subse-
3
AT32UC3A
(2)
2
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