AT32UC3A3256 Atmel Corporation, AT32UC3A3256 Datasheet - Page 819
AT32UC3A3256
Manufacturer Part Number
AT32UC3A3256
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT32UC3A0128.pdf
(377 pages)
2.AT32UC3A0128.pdf
(33 pages)
3.AT32UC3A0128.pdf
(159 pages)
4.AT32UC3A3128.pdf
(91 pages)
5.AT32UC3A3128.pdf
(1012 pages)
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
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- AT32UC3A0128 PDF datasheet
- AT32UC3A0128 PDF datasheet #2
- AT32UC3A0128 PDF datasheet #3
- AT32UC3A3128 PDF datasheet #4
- AT32UC3A3128 PDF datasheet #5
- Current page: 819 of 1012
- Download datasheet (16Mb)
30.6.2
32072G–11/2011
MultiMedia Card Operations
Figure 30-8. Mixing MultiMedia and SD Memory Cards with Two Slots
When the MCI is configured to operate with SD memory cards, the width of the data bus can be
selected in the SDCard /SDIO Bus Width field in the SDCR register (SDCR.SDCBUS).
tion “30.7.4” on page 840.
In the case of multimedia cards, only the data line 0 is used. The other data lines can be used as
independent GPIOs.
When more than one card (MMC or SD) is plugged to the device, it is strongly recommended to
connect each card’s clock to a dedicate MCI CLK pin of the device. Otherwise, Compliance to
specifications is not guaranteed.
After a power-on reset, the cards are initialized by a special message-based MultiMedia Card
bus protocol. Each message is represented by one of the following tokens:
Card addressing is implemented using a session address assigned during the initialization
phase by the bus controller to all currently connected cards. Their unique CID number identifies
individual cards.
• Command: a command is a token that starts an operation. A command is sent from the host
• Response: a response is a token which is sent from an addressed card or (synchronously)
• Data: data can be transferred from the card to the host or vice versa. Data is transferred via
either to a single card (addressed command) or to all connected cards (broadcast
command). a command is transferred serially on the CMD line.
from all connected cards to the host as an answer to a previously received command. A
response is transferred serially on the CMD line.
the data line.
DATA[11:8]
DATA[7:0]
CMD[0]
CMD[1]
CLK
CLK
for details.
910
1 2 3 4 5 6
11
MMC1
1213 8
SDCARD
7
910
1 2 3 4 5 6
11
MMC2
1213 8
7
910
1 2 3 4 5 6
11
MMC3
1213 8
7
See Sec-
819
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