RM0082
Miscellaneous registers (Misc)
Doc ID 018672 Rev 1
225/844
12.4.9 CORE_CLK_CFG
register
The CORE_CLK_CFG is an R/W register used to configure the internal platform clock
domains. The register bit assignments is given in the next table.
[01]
pll2_enb_clkout
1’h0
Enable PLL2 clock output probing; this functionality is
used to check the internal PLL2 clock integrity:
1’b0: Disable clock probing (normal mode).
1’b1: PLL2 clock out (clk1 x 1/8) multiplexed on
basGPIO(1) signal.
[00]
pll1_enb_clkout
1’h0
Enable PLL1 clock output probing; this functionality is
used to check the internal PLL1 clock integrity:
1’b0: Disable clock probing (normal mode).
1’b1: PLL1 clock out (clk1 x 1/8) multiplexed on
basGPIO(0) signal
Table 163.
PLL_CLK_CFG register bit assignments (continued)
PLL_CLK_CFG Register
0x020
Bit
Name
Reset
Value
Description
Table 164.
CORE_CLK_CFG register bit assignments
CORE_CLK_CFG Register
0x024
Bit
Name
Reset
Value
Description
[31:22]
RFU
-
Reserved for future use (Write don’t care - Read return
zeros).
[21:20]
Osci24_div-ratio
2’h0
OSCI24 divider config. table
Control bit Ratio
Description
2’b00
1:2
24 MHz to divider out ratio.
2’b01
1:4
24 MHz to divider out ratio.
2’b10
1:16
24 MHz to divider out ratio.
2’b11
1:32
24 MHz to divider out ratio.
[19]
Osci24_div_en
1’h0
When set the 24 MHz Oscillator clock, used in SLOW
and DOZE mode for the AMBA subsystem, is divided by
a prescaler. The prescaler division factor can be set
through osci24_div_ratio field.
[18]
ras_synt34_clks
el
1’h0
Current field selects the RAS clock synthesizer Synt-3
and Synt-4 input source clock (ref. Auxiliary clock
synthesizer register description):
1’b0: Clock synthesizer input freq. Fin = PLL1 output
clock (333 MHz).
1’b1: Clock synthesizer input freq. Fin = PLL2 output
clock (programmable value)
[17:12]
RFU
-
Reserved for future use (Write don’t care - Read return
zeros).