AT32UC3B1256-Z1UR Atmel, AT32UC3B1256-Z1UR Datasheet - Page 51

• Manufacturer Part Number: AT32UC3B1256-Z1UR
• Description: MCU AVR32 256K FLASH 48-QFN
• Manufacturer: Atmel
• Series: AVR®32 UC3r

Specifications of AT32UC3B1256-Z1UR

• Package / Case: 48-QFN Exposed Pad
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 60MHz
• Number Of I /o: 28
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Program Memory Size: 256KB (256K x 8)
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Connectivity: I²C, IrDA, SPI, SSC, UART/USART, USB
• Core Size: 32-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

9.6.2
Name:
Access Type:
Offset:
Reset Value:
•
•
•
•
32059J–12/2010
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
CPUDIV = 0: CPU clock equals main clock.
CPUDIV = 1: CPU clock equals main clock divided by 2
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.
to the CPU clock.
Clock Select Register
AT32UC3B
30
22
14
6
-
-
-
-
CKSEL
Read/Write
0x004
0x00000000
, HSBDIV always equals CPUDIV, and HSBSEL always equals CPUSEL, as the HSB clock is always equal
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
AT32UC3B
24
16
8
0
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