AT32UC3L0256 Atmel Corporation, AT32UC3L0256 Datasheet - Page 487

• Manufacturer Part Number: AT32UC3L0256
• Manufacturer: Atmel Corporation

Specifications of AT32UC3L0256

• Flash (kbytes): 256 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 50 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 17
• Hardware Qtouch Acquisition: Yes
• Max I/o Pins: 36
• Ext Interrupts: 36
• Usb Speed: No
• Usb Interface: No
• Spi: 5
• Twi (i2c): 2
• Uart: 4
• Lin: 4
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 460
• Analog Comparators: 8
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 16
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.62 to 3.6
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 18
• Input Capture Channels: 12
• Pwm Channels: 35
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

21.9.2
Name:
Access Type:
Offset:
Reset Value:
• EXP: Clock Prescaler
• DATA: Data Setup and Hold Cycles
• STASTO: START and STOP Cycles
• HIGH: Clock High Cycles
• LOW: Clock Low Cycles
32145A–12/2011
31
23
15
7
-
Used to specify how to prescale the TWCK clock. Counters are prescaled according to the following formula
Clock cycles for data setup and hold count. Prescaled by CWGR.EXP. Used to time T
Clock cycles in clock high count. Prescaled by CWGR.EXP. Used to time T
Clock cycles in clock high count. Prescaled by CWGR.EXP. Used to time T
Clock cycles in clock low count. Prescaled by CWGR.EXP. Used to time T
f
PRESCALER
Clock Waveform Generator Register
=
30
22
14
6
f
------------------------- -
2
CLK_TWIM
CWGR
Read/Write
0x04
0x00000000
EXP
+
1
EXP
29
21
13
5
28
20
12
4
STASTO
HIGH
LOW
27
19
11
3
LOW
HD_STA
HIGH
, T
.
BUF
, T
26
18
10
2
.
SU_STA
HD_DAT
AT32UC3L0128/256
DATA
, T
, T
SU_STO
SU_DAT
25
17
9
1
.
24
16
8
0
487