at91rm3400 ATMEL Corporation, at91rm3400 Datasheet - Page 148
at91rm3400
Manufacturer Part Number
at91rm3400
Description
Atmel Advanced At91 Arm Microcontroller
Manufacturer
ATMEL Corporation
Datasheet
1.AT91RM3400.pdf
(461 pages)
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PMC Clock Generator PLL A Register
Register Name: CKGR_PLLAR
Access Type:
Possible limitations on PLLA input frequencies and multiplier factors should be checked before using the Clock Generator.
• 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: PLLA Clock Frequency Range
• MULA: PLL A Multiplier
0 = The PLL A is deactivated.
1 up to 2047 = The PLLA Clock frequency is the PLLA input frequency multiplied by MULA + 1.
148
DIVA
0
1
2 - 255
31
23
15
–
7
0
0
1
1
AT91RM3400
OUTA
OUTA
Read/Write
30
22
14
–
6
0
1
0
1
29
21
13
1
5
Divider Selected
Divider output is 0
Divider is bypassed
Divider output is the Main Clock divided by DIVA.
PLLA Frequency Output Range
80 MHz to 160 MHz
Reserved
150 MHz to 240 MHz
Reserved
28
20
12
–
4
MULA
DIVA
27
19
11
–
3
PLLACOUNT
26
18
10
2
MULA
25
17
9
1
1790A–ATARM–11/03
24
16
8
0
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