AT32UC3A3256 Atmel Corporation, AT32UC3A3256 Datasheet - Page 186

• Manufacturer Part Number: AT32UC3A3256
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A3256

• 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

AT32UC3A3/A4
Figure 15-9. READMODE = 1: Data Is Sampled by SMC Before the Rising Edge of NRD
CLK_SMC
A[AD_MSB:2]
NBS0, NBS1,
A0, A1
NRD
NCS
t
PACC
D[15:0]
Data Sampling
•Read is controlled by NCS (MODE.READMODE = 0)
Figure 15-10 on page 187
shows the typical read cycle of an LCD module. The read data is valid
t
after the falling edge of the NCS signal and remains valid until the rising edge of NCS. Data
PACC
must be sampled when NCS is raised. In that case, the MODE.READMODE bit must be written
to zero (read is controlled by NCS): the SMC internally samples the data on the rising edge of
CML_SMC that generates the rising edge of NCS, whatever the programmed waveform of NRD
may be.
186
32072G–11/2011