AT32UC3A4256 Atmel Corporation, AT32UC3A4256 Datasheet - Page 205
AT32UC3A4256
Manufacturer Part Number
AT32UC3A4256
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 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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT32UC3A4256S-C1UR
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT32UC3A4256S-U
Manufacturer:
ST
Quantity:
79
Part Number:
AT32UC3A4256S-U
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
- AT32UC3A0128 PDF datasheet
- AT32UC3A0128 PDF datasheet #2
- AT32UC3A0128 PDF datasheet #3
- AT32UC3A3128 PDF datasheet #4
- AT32UC3A3128 PDF datasheet #5
- Current page: 205 of 1012
- Download datasheet (16Mb)
15.6.7.4
Figure 15-29. NWAIT Latency
32072G–11/2011
nternally synchronized
NWAIT signal
A[AD_MSB:2]
NBS0, NBS1,
CLK_SMC
A0, A1
NWAIT
NWAIT latency and read/write timings
NRD
There may be a latency between the assertion of the read/write controlling signal and the asser-
tion of the NWAIT signal by the device. The programmed pulse length of the read/write
controlling signal must be at least equal to this latency plus the two cycles of resynchronization
plus one cycle. Otherwise, the SMC may enter the hold state of the access without detecting the
NWAIT signal assertion. This is true in frozen mode as well as in ready mode. This is illustrated
on
When the MODE.EXNWMODE field is enabled (ready or frozen), the user must program a pulse
length of the read and write controlling signal of at least:
Figure 15-29 on page
4
minimal pulse length
NWAIT latency 2 cycle resynchronization
3
Minimal pulse length
205.
2
EXNWMODE = 2 or 3
READMODE = 1 (NRD controlled)
NRDPULSE = 5
=
Read cycle
NWAIT latency
1
0
+
2 synchronization cycles
0
Wait STATE
0
+
1 cycle
205
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