at91sam9260-cj ATMEL Corporation, at91sam9260-cj Datasheet - Page 275
at91sam9260-cj
Manufacturer Part Number
at91sam9260-cj
Description
At91 Arm Thumb Microcontrollers
Manufacturer
ATMEL Corporation
Datasheet
1.AT91SAM9260-CJ.pdf
(790 pages)
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26.9.9
Register Name:
Access Type:
Possible limitations on PLL A input frequencies and multiplier factors should be checked before using the PMC.
Warning: Bit 29 must always be set to 1 when programming the CKGR_PLLAR register.
• DIVA: Divider A
• PLLACOUNT: PLL A Counter
Specifies the number of Slow Clock cycles before the LOCKA bit is set in PMC_SR after CKGR_PLLAR is written.
• OUTA: PLL A Clock Frequency Range
To optimize clock performance, this field must be programmed as specified in “PLL Characteristics” in the Electrical Char-
acteristics section of the product datasheet.
• MULA: PLL A Multiplier
0 = The PLL A is deactivated.
1 up to 2047 = The PLL A Clock frequency is the PLL A input frequency multiplied by MULA + 1.
6221G–ATARM–31-Jan-08
DIVA
0
1
2 - 255
31
23
15
–
7
PMC Clock Generator PLL A Register
OUTA
30
22
14
CKGR_PLLAR
Read/Write
–
6
29
21
13
1
5
Divider Selected
Divider output is 0
Divider is bypassed
Divider output is the Main Clock divided by DIVA.
28
20
12
–
4
MULA
DIVA
27
19
11
–
3
PLLACOUNT
26
18
10
2
AT91SAM9260
MULA
25
17
9
1
24
16
8
0
275
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