AT32UC3A0128 Atmel Corporation, AT32UC3A0128 Datasheet - Page 395

• Manufacturer Part Number: AT32UC3A0128
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A0128

• 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: 109
• Ext Interrupts: 109
• 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): 32
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: sdram
• 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
27.6.7.3
Figure 27-29. NWAIT Assertion in Write Access: Ready Mode (EXNW_MODE = 11).
In te rn a lly s y n c h ro n iz e d
N W A IT s ig n a l
N B S 0 , N B S 1 ,
C L K _ S M C
A 0 , A 1
A [2 5 :2 ]
N W A IT
D [1 5 :0 ]
Ready Mode
N C S
N W E
6
In Ready mode (EXNW_MODE = 11), the SMC behaves differently. Normally, the SMC begins
the access by down counting the setup and pulse counters of the read/write controlling signal. In
the last cycle of the pulse phase, the resynchronized NWAIT signal is examined.
If asserted, the SMC suspends the access as shown in
deassertion, the access is completed: the hold step of the access is performed.
This mode must be selected when the external device uses deassertion of the NWAIT signal to
indicate its ability to complete the read or write operation.
If the NWAIT signal is deasserted before the end of the pulse, or asserted after the end of the
pulse of the controlling read/write signal, it has no impact on the access length as shown in
ure
27-30.
4
5
4
3
3
2
1
2
E X N W _ M O D E = 1 1 (R e a d y m o d e )
W R IT E _ M O D E = 1 (N W E _ c o n tro lle d )
N W E _ P U L S E = 5
N C S _ W R _ P U L S E = 7
W rite c y c le
0
1
F R O Z E N S T A T E
0
1
Figure 27-29
0
1
0
and
AT32UC3A
Figure
27-30. After
Fig-
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