AT32UC3A3256AU Atmel Corporation, AT32UC3A3256AU Datasheet - Page 209

• 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

Figure 15-33. Page Mode Read Protocol (Address MSB and LSB Are Defined in
15.6.9.2
32072G–11/2011
A[MSB]
D[15:0]
A[LSB]
CLK_SMC
NRD
NCS
Byte access type in page mode
The NRD and NCS signals are held low during all read transfers, whatever the programmed val-
ues of the setup and hold timings in the User Interface may be. Moreover, the NRD and NCS
timings are identical. The pulse length of the first access to the page is defined with the
PULSE.NCSRDPULSE field value. The pulse length of subsequent accesses within the page
are defined using the PULSE.NRDPULSE field value.
In page mode, the programming of the read timings is described in
Table 15-7.
The SMC does not check the coherency of timings. It will always apply the NCSRDPULSE tim-
ings as page access timing (t
programmed value for t
The byte access type configuration remains active in page mode. For 16-bit or 32-bit page mode
devices that require byte selection signals, configure the MODE.BAT bit to zero (byte select
access type).
Parameter
READMODE
NCSRDSETUP
NCSRDPULSE
NRDSETUP
NRDPULSE
NRDCYCLE
NCSRDPULSE
Programming of Read Timings in Page Mode
t
pa
Value
‘x’
‘x’
t
‘x’
t
‘x’
pa
sa
pa
is shorter than the programmed value for t
pa
) and the NRDPULSE for accesses to the page (t
Definition
No impact
No impact
Access time of first access to the page
No impact
Access time of subsequent accesses in the page
No impact
NRDPULSE
t
sa
Table 15-6 on page
NRDPULSE
t
sa
Table 15-7 on page
sa
.
208)
sa
), even if the
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