RM0082
Miscellaneous registers (Misc)
Doc ID 018672 Rev 1
231/844
12.4.13 PRSC1/2/3_CLK_CFG
register
The PRSC1/2/3_CLK_CFG are three RW registers used to configure the timer pre scalar
frequencies. The output frequency is given from the following expressions:
with M < 4096, N < 16; Fin = (PLL1 out frequency) 333 MHz. F
out
Max 83 MHz.
The register bit assignments is detailed in the next table.
[11]
ras_synt4_clkenb
1’h0
1’b0: Disable internal synthesizer-4 source clock.
1’b1: Enable internal synthesizer-4 source clock.
[10]
ras_synt3_clkenb
1’h0
1’b0: Disable internal synthesizer-3 source clock.
1’b1: Enable internal synthesizer-3 source clock.
[09]
ras_synt2_clkenb
1’h0
1’b0: Disable internal synthesizer-2 source clock.
1’b1: Enable internal synthesizer-2 source clock.
[08]
ras_synt1_clkenb
1’h0
1’b0: Disable internal synthesizer-1 source clock.
1’b1: Enable internal synthesizer-1 source clock.
[07]
pll2_clkenb
1’h0
1’b0: Disable PLL2 source clock.
1’b1: Enable PLL2 source clock.
[06]
RFU
[05]
clk48M_clkenb
1’h0
1’b0: Disable 48 MHz internal source clock.
1’b1: Enable 48 MHz internal source clock.
[04]
Clk24M_clkenb
1’h0
1’b0: Disable 24 MHz external source clock signal.
1’b1: Enable 24 MHz external source clock signal.
[03]
clk32K_clkenb
1’h0
1’b0: Disable 32 kHz external source clock signal.
1’b1: Enable 32 kHz external source clock signal.
[02]
pclkappl_clkenb
1’h0
1’b0: Disable internal PCLK (APB application Subsystem)
source clock.
1’b1: Enable internal PCLK (APB application Subsystem)
source clock.
[01]
pll1_clkenb
1’h0
1’b0: Disable PLL1 source clock.
1’b1: Enable PLL1 source clock.
[00]
hclk_clkenb
1’h0
1’b0: Disable internal AHB HCLK source clock.
1’b1: Enable internal AHB HCLK source clock.
Table 167.
RAS_CLK_ENB register bit assignments (continued)
RAS_CLK_ENB Register
0x034
Bit
Name
Reset
Value
Description
F
out
F
in
2
N
1
+
(
)
M
1
+
(
)
×
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