AT32UC3A4256 Atmel Corporation, AT32UC3A4256 Datasheet - Page 492
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: 492 of 1012
- Download datasheet (16Mb)
23.9.3
Name:
Access Type:
Offset:
Reset Value:
• EXP: SMBus Timeout Clock Prescaler
• THMAX: Clock High Maximum Cycles
• TLOWM: Master Clock Stretch Maximum Cycles
• TLOWS: Slave Clock Stretch Maximum Cycles
32072G–11/2011
31
23
15
7
Used to specify how to prescale the TIM and TLOWM counters in SMBTR. Counters are prescaled according to the following
formula
Clock cycles in clock high maximum count. Prescaled by SMBTR.EXP. Used for bus free detection. Used to time T
NOTE: Uses the prescaler specified by CWGR, NOT the prescaler specified by SMBTR.
Clock cycles in master maximum clock stretch count. Prescaled by SMBTR.EXP. Used to time T
Clock cycles in slave maximum clock stretch count. Prescaled by SMBTR.EXP. Used to time T
SMBus Timing Register
f
prescaled SMBus
,
30
22
14
6
SMBTR
Read/Write
0x08
0x00000000
=
EXP
f
------------------------
2
CLKTWIM
(
EXP
+
1
)
29
21
13
5
28
20
12
4
TLOWM
THMAX
TLOWS
27
19
11
3
-
26
18
10
2
-
LOW:SEXT
LOW:MEXT
25
17
9
1
-
.
24
16
HIGH:MAX
8
0
-
.
492
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