AT32UC3A4256 Atmel Corporation, AT32UC3A4256 Datasheet - Page 817

• Manufacturer Part Number: AT32UC3A4256
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A4256

• Flash (kbytes): 256 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 66 MHz
• Cpu: 32-bit AVR
• Hardware Qtouch Acquisition: No
• Usb Transceiver: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device + OTG
• Spi: 6
• Twi (i2c): 2
• Uart: 4
• Ssc: 1
• Sd / Emmc: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 128
• Self Program Memory: YES
• Dram Memory: No
• 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: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

32072G–11/2011
The MultiMedia Card communication is based on a 13-pin serial bus interface. It has three com-
munication lines and four supply lines.
Table 30-2.
Notes:
Figure 30-4. MMC Bus Connections (One Slot)
Figure 30-5. SD Memory Card Bus Topology
Pin
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
1. I: Input, O: Output, PP: Push/Pull, OD: Open Drain.
DATA[7:0]
MCI
Bus Topology
CMD
CLK
Name
DAT[3]
CMD
VSS1
VDD
CLK
VSS2
DAT[0]
DAT[1]
DAT[2]
DAT[4]
DAT[5]
DAT[6]
DAT[7]
Type
I/O/PP
I/O/PP/OD
S
S
I/O
S
I/O/PP
I/O/PP
I/O/PP
I/O/PP
I/O/PP
I/O/PP
I/O/PP
910
1 2 3 4 5 6
(1)
11
MMC1
9
1213 8
1 2
SDCARD
3
7
Description
Data
Command/response
Supply voltage ground
Supply voltage
Clock
Supply voltage ground
Data 0
Data 1
Data 2
Data 4
Data 5
Data 6
Data 7
4
5 6 7 8
910
1 2 3 4 5 6
11
MMC2
1213 8
7
DATAz[5]
MCI Pin Name
(Slot z)
DATAz[3]
CMDz
VSS
VDD
CLK
VSS
DATAz[0]
DATAz[1]
DATAz[2]
DATAz[4]
DATAz[6]
DATAz[7]
910
1 2 3 4 5 6
11
MMC3
12 13 8
(2)
7
817