AT32UC3A4128 Atmel Corporation, AT32UC3A4128 Datasheet - Page 191
AT32UC3A4128
Manufacturer Part Number
AT32UC3A4128
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 AT32UC3A4128
Flash (kbytes)
128 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
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
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- AT32UC3A0128 PDF datasheet
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- AT32UC3A0128 PDF datasheet #3
- AT32UC3A3128 PDF datasheet #4
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15.6.4.6
Table 15-4.
15.6.4.7
32072G–11/2011
Coded Value
setup [5:0]
pulse [6:0]
cycle [8:0]
Coding timing parameters
Usage restriction
Coding and Range of Timing Parameters
Number of Bits
6
7
9
All timing parameters are defined for one chip select and are grouped together in one register
according to their type.
The Setup register (SETUP) groups the definition of all setup parameters:
The Pulse register (PULSE) groups the definition of all pulse parameters:
The Cycle register (CYCLE) groups the definition of all cycle parameters:
Table 15-4 on page 191
The SMC does not check the validity of the user-programmed parameters. If the sum of SETUP
and PULSE parameters is larger than the corresponding CYCLE parameter, this leads to unpre-
dictable behavior of the SMC.
For read operations:
Null but positive setup and hold of address and NRD and/or NCS can not be guaranteed at the
memory interface because of the propagation delay of theses signals through external logic and
pads. If positive setup and hold values must be verified, then it is strictly recommended to pro-
gram non-null values so as to cover possible skews between address, NCS and NRD signals.
For write operations:
If a null hold value is programmed on NWE, the SMC can guarantee a positive hold of address,
byte select lines, and NCS signal after the rising edge of NWE. This is true if the MODE.WRITE-
MODE bit is written to one. See
For read and write operations: a null value for pulse parameters is forbidden and may lead to
unpredictable behavior.
In read and write cycles, the setup and hold time parameters are defined in reference to the
address bus. For external devices that require setup and hold time between NCS and NRD sig-
nals (read), or between NCS and NWE signals (write), these setup and hold times must be
converted into setup and hold times in reference to the address bus.
• NRDSETUP, NCSRDSETUP, NWESETUP, and NCSWRSETUP.
• NRDPULSE, NCSRDPULSE, NWEPULSE, and NCSWRPULSE.
• NRDCYCLE, NWECYCLE.
256 x cycle[8:7] + cycle[6:0]
128 x setup[5] + setup[4:0]
256 x pulse[6] + pulse[5:0]
Effective Value
shows how the timing parameters are coded and their permitted range.
Section
15.6.5.2.
128 ≤ value ≤ 255
256 ≤ value ≤ 383
384 ≤ value ≤ 511
64 ≤ value ≤ 127
32 ≤ value ≤ 63
0 ≤ value ≤ 127
0 ≤ value ≤ 31
0 ≤ value ≤ 63
Coded Value
Permitted Range
256 ≤ value ≤ 256+127
512 ≤ value ≤ 512+127
768 ≤ value ≤ 768+127
128 ≤ value ≤ 128+31
256 ≤ value ≤ 256+63
Effective Value
0 ≤ value ≤ 127
0 ≤ value ≤ 31
0 ≤ value ≤ 63
191
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