ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 485

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

28.14.11 PMC Master Clock Register
Name:
Address:
Access:
• CSS: Master Clock Source Selection
• PRES: Processor Clock Prescaler
• UPLLDIV: UPLL Divider
0: UPLLDIV = 1 (clock is not divided).
1: UPLLDIV = 2 (clock is divided by 2).
UPLLDIV must be set (clock divided by 2) when UPLL is selected as source of clock for MCK.
6430D–ATARM–25-Mar-11
31
23
15
–
–
–
7
–
PMC_MCKR
0x400E0430
Read-write
0
0
0
0
1
1
1
1
0
0
1
1
30
22
14
–
–
–
6
UPLLDIV
PRES
29
21
13
–
–
5
CSS
PRES
0
0
1
1
0
0
1
1
28
20
12
–
–
–
4
0
1
0
1
27
19
11
–
–
–
3
–
0
1
0
1
0
1
0
1
Clock Source Selection
Slow Clock is selected
Main Clock is selected
PLLA Clock is selected
UPLL Clock is selected
26
18
10
–
–
–
–
2
Processor Clock
Selected clock
Selected clock divided by 2
Selected clock divided by 4
Selected clock divided by 8
Selected clock divided by 16
Selected clock divided by 32
Selected clock divided by 64
Selected clock divided by 3
SAM3U Series
25
17
–
–
–
9
1
CSS
24
16
–
–
–
8
0
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