AT32UC3A1256AU Atmel Corporation, AT32UC3A1256AU Datasheet - Page 373

• 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
Table 27-2.
27.6.4
Signal Name
Device Type
Byte Access Type (BAT)
NBS0_A0
NWE_NWR0
NBS1_NWR1
NBS2_NWR2_A1
NBS3_NWR3
Standard Read and Write Protocols
SMC Multiplexed Signal Translation
Figure 27-8. Connection of 2x16-bit Data Bus on a 32-bit Data Bus (Byte Select Option)
In the following sections, the byte access type is not considered. Byte select lines (NBS0 to
NBS3) always have the same timing as the A address bus. NWE represents either the NWE sig-
nal in byte select access type or one of the byte write lines (NWR0 to NWR3) in byte write
access type. NWR0 to NWR3 have the same timings and protocol as NWE. In the same way,
NCS represents one of the NCS[0..3] chip select lines.
Byte Select
1x32-bit
NBS0
NBS1
NBS2
NBS3
NWE
Byte Select
32-bit Bus
2x16-bit
NBS0
NBS1
NBS2
NBS3
SMC
NWE
D[31:16]
D[15:0]
NCS[3]
A[25:2]
NBS0
NBS1
NBS2
NBS3
NRD
NWE
Byte Write
4 x 8-bit
NWR0
NWR1
NWR2
NWR3
Byte Select
1x16-bit
NBS0
NBS1
NWE
A1
16-bit Bus
A[23:0]
Low Byte Enable
High Byte Enable
Read Enable
Memory Enable
D[15:0]
A[23:0]
Write Enable
D[31:16]
Write Enable
Low Byte Enable
High Byte Enable
Read Enable
Memory Enable
Byte Write
2 x 8-bit
NWR0
NWR1
A1
AT32UC3A
8-bit Bus
1 x 8-bit
NWE
A0
A1
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