AT32UC3A0512-ALTTA Atmel, AT32UC3A0512-ALTTA Datasheet - Page 251

• Manufacturer Part Number: AT32UC3A0512-ALTTA
• Description: IC MCU AVR32 512K FLASH 144LQFP
• Manufacturer: Atmel
• Series: AVR®32 UC3r

Specifications of AT32UC3A0512-ALTTA

• Core Processor: AVR
• Core Size: 32-Bit
• Speed: 66MHz
• Connectivity: EBI/EMI, Ethernet, I²C, SPI, SSC, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 109
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

24.14.6
Name:
Access:
Reset Value: 0x00000000
CWGR is only used in Master mode.
• CLDIV: Clock Low Divider
The SCL low period is defined as follows:
• CHDIV: Clock High Divider
The SCL high period is defined as follows:
• CKDIV: Clock Divider
The CKDIV is used to increase both SCL high and low periods.
32058J-AVR32-04/11
T
T
low
high
=
=
31
23
15
–
7
(
(
(
CLDIV
(
CHDIV
TWI Clock Waveform Generator Register
CWGR
Read-write
×
×
2
CKDIV
2
CKDIV
30
22
14
–
6
)
+
)
+
4 )
4 )
×
×
T
MCK
T
MCK
29
21
13
–
5
28
20
12
–
4
CHDIV
CLDIV
27
19
11
–
3
26
18
10
–
2
CKDIV
25
17
–
9
1
AT32UC3A
24
16
–
8
0
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