at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 373
at91sam9263
Manufacturer Part Number
at91sam9263
Description
At91 Arm Thumb Microcontrollers
Manufacturer
ATMEL Corporation
Datasheet
1.AT91SAM9263.pdf
(1065 pages)
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27.9.11
Register Name:
Access Type:
• CSS: Master Clock Selection
• PRES: Processor Clock Prescaler
• MDIV: Master Clock Division
6249D–ATARM–20-Dec-07
31
23
15
–
–
–
7
–
0
0
1
1
PMC Master Clock Register
0
0
0
0
1
1
1
1
MDIV
0
0
1
1
30
22
14
PMC_MCKR
Read/Write
–
–
–
6
–
0
1
0
1
29
21
13
–
–
–
5
–
CSS
Master Clock Division
Master Clock is Processor Clock.
Master Clock is Processor Clock divided by 2.
Master Clock is Processor Clock divided by 4.
Reserved.
PRES
0
0
1
1
0
0
1
1
28
20
12
–
–
–
4
0
1
0
1
PRES
27
19
11
–
–
–
3
AT91SAM9263 Preliminary
0
1
0
1
0
1
0
1
Clock Source Selection
Slow Clock is selected
Main Clock is selected
PLL A Clock is selected
PLL B 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
Reserved
25
17
–
–
9
1
MDIV
CSS
24
16
–
–
8
0
373
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