AT32UC3A3256AU Atmel Corporation, AT32UC3A3256AU Datasheet - Page 460

• Manufacturer Part Number: AT32UC3A3256AU
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A3256AU

• 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

22.9.3
Name:
Access Type:
Offset:
Reset Value:
• EXP: Clock Prescaler
• SUDAT: Data Setup Cycles
• TTOUT: SMBus T
• TLOWS: SMBus T
32072G–11/2011
31
23
15
7
Used to specify how to prescale the SMBus TLOWS counter. The counter is prescaled according to the following formula:
Non-prescaled clock cycles for data setup count. Used to time T
This timing is used for timing the ACK/NAK bits, and any data bits driven in slave transmitter mode.
Prescaled clock cycles used to time SMBus T
Prescaled clock cycles used to time SMBus T
Timing Register
TIMEOUT
LOW:SEXT
30
22
14
6
TR
Read/Write
0x08
0x00000000
Cycles
Cycles
EXP
29
21
13
5
TIMEOUT
LOW:SEXT
f
PRESCALED
28
20
12
4
.
TLOWS
.
SUDAT
TTOUT
=
f
------------------------ -
2
CLK_TWIS
(
EXP
SU_DAT
27
19
11
3
-
+
1
. Data is driven SUDAT cycles after TWCK low detected.
)
26
18
10
2
-
25
17
9
1
-
24
16
8
0
-
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