RM0082
Miscellaneous registers (Misc)
Doc ID 018672 Rev 1
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Table 163.
PLL_CLK_CFG register bit assignments
PLL_CLK_CFG Register
0x020
Bit
Name
Reset
Value
Description
[31]
RFU
-
Reserved for future use (Write don’t care - Read return
zeros).
[30:28]
mctr_clk_sel
3’h0
MPMC memory controller DDR_CLK configuration.
3’b000
Synch mode: core clock provided from PLL1:
1:1
for DDRCORE_CLK the reference frequency
is HCLK. DDR_CLK = HCLK.
3’b001
Synch mode: core clock provided from PLL1:
2:1
for DDRCORE_CLK the reference frequency
is 2x HCLK. DDR_CLK = 2 x HCLK.
Note: Ratio 2:1 must also be be set in the
ahbX_fifo_type_reg parameter (see
Table 151 in Section 11)
3’b010
Reserved for future use.
3’b011
Asynch mode: core clock provided from
PLL2
>1:1 (clock up to 333 MHz).
<1:1 (clock range 100 - 166 MHz).
3’b1XX
Reserved for future use.
[27]
RFU
-
Reserved for future use (Write don’t care - Read return
zeros).
[26-24]
pll2_clk_sel
3’h0
Auxiliary PLL2 source clock configuration
Control
Bit
Description
3’b000
24 MHz Oscillator (default mode)
3’b001
Programmable PL_CLK (3) signal.
3’b010
Reserved for future use
3’b011
Reserved for future use.
3’b1XX
Reserved for future use.
[23]
RFU
-
Reserved for future use (Write don’t care - Read return
zeros.)