Datasheet

199
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
22.13.14 PMC Programmable Clock Register
Name: PMC_PCKx
Address: 0xFFFFFC40
Access: Read-write
• CSS: Master Clock Source Selection
• PRES: Programmable Clock Prescaler
31 30 29 28 27 26 25 24
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23 22 21 20 19 18 17 16
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15 14 13 12 11 10 9 8
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76543210
–PRES– CSS
Value name Description
0 SLOW_CLK Slow Clock is selected
1 MAIN_CLK Main Clock is selected
2 PLLA_CLK PLLACK/PLLADIV2 is selected
3 UPLL_CLK UPLL Clock is selected
4 MCK_CLK Master Clock is selected
Value name Description
0 CLOCK Selected clock
1 CLOCK_DIV2 Selected clock divided by 2
2 CLOCK_DIV4 Selected clock divided by 4
3 CLOCK_DIV8 Selected clock divided by 8
4 CLOCK_DIV16 Selected clock divided by 16
5 CLOCK_DIV32 Selected clock divided by 32
6 CLOCK_DIV64 Selected clock divided by 64
7 Reserved Reserved