AT32UC3A0512-ALTTA Atmel, AT32UC3A0512-ALTTA Datasheet - Page 69

• 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: -

13.6.2
Name:
Access Type:
•
•
•
•
Note that if xxxDIV is written to 0, xxxSEL should also be written to 0 to ensure correct operation.
Also note that writing this register clears POSCSR:CKRDY. The register must not be re-written until CKRDY goes high.
32058J–AVR32–04/11
PBBDIV, PBBSEL: PBB Division and Clock Select
PBADIV, PBASEL: PBA Division and Clock Select
HSBDIV, HSBSEL: HSB Division and Clock Select
CPUDIV, CPUSEL: CPU Division and Clock Select
CPUDIV
PBBDIV
PBADIV
HSBDIV
31
23
15
7
PBBDIV = 0: PBB clock equals main clock.
PBBDIV = 1: PBB clock equals main clock divided by 2
PBADIV = 0: PBA clock equals main clock.
PBADIV = 1: PBA clock equals main clock divided by 2
For the AT32UC3A, HSBDIV always equals CPUDIV, and HSBSEL always equals CPUSEL, as the HSB clock is always equal to
the CPU clock.
CPUDIV = 0: CPU clock equals main clock.
CPUDIV = 1: CPU clock equals main clock divided by 2
Clock Select
30
22
14
6
-
-
-
-
CKSEL
Read/Write
29
21
13
5
-
-
-
-
28
20
12
4
-
-
-
-
(PBBSEL+1)
(PBASEL+1)
(CPUSEL+1)
.
.
27
19
11
.
3
-
-
-
-
26
18
10
2
HSBSEL
CPUSEL
PBBSEL
PBASEL
25
17
9
1
AT32UC3A
24
16
8
0
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