Achronix Speedster22i User Macro Guide Manuale Utente Scaricare il pdf (Pagina 207)

PLL/DLL Clock Generators ACX_CLKGEN

Speedster Macro Cell Library

www.achronix.com PAGE 190

Parameters

Table 9-2: Parameters

Parameter Description Defined Values

Default

Value

clkdiv Reference Divider value. 6’h01 - 6’h24 6’h1

intfb Internal Feedback Enable.

0: Disable internal feedback.

1: Enables (internal) feedback divisor.

1’b0,1’b1

1’b0

phaseinc_sat Mixed Feedback Mode. Not supported if intfb=0.

0: Pure internal feedback mode (if intfb = 1),

Pure external feedback mode (if intfb = 0)

1: Mixed feedback mode (if intfb = 1).

1’b0,1’b1 1’b0

clkmult Feedback Divider Divisor Value.

Integer mode:8’h02-8’h42,

Fractional mode: 8’h8-8’h42

8’h0

synthmode Feedback Divider Mode.

0: Integer mode.

1: Fractional mode. Uses frac_div_ctrl

1’b0,1’b1 1’b0

frac_div_ctrl Feedback Divider Fractional Portion. (requires synth-

mode = 1). In fractional mode, frac_div_ctrl is the 16-bit

numerator which is divided by 65536. The resultant

fraction is then used to scale the Feedback Divider

value.

16’h0000-16’hFFFF 16’h0000

rst_short_long Unused. 1’b0,1’b1 1’b0

clkouten_mode Clock Enable Mode.

0: Enable clock outputs with the clken_out0 -

clken_out3 parameters.

1: Enable clock outputs with the core_clken[3:0]

inputs.

1’b0,1’b1 1’b0

pll_user_reset_en PLL User Reset Enable.

0: Disable PLL rstn input.

1: Enable PLL rstn input.

1’b0,1’b1 1’b0

pll_user_outrst_en PLL User Output Phase Reset Enable.

0: Disable PLL outphrstn input.

1: Enable PLL outphrstn input.

1’b0,1’b1 1’b0

pll_user_csrrst_en PLL User Reset Enable for Serial Control Bus block.

0: Disable PLL ick_dspll_sif_rstn input.

1: Enable PLL ick_dspll_sif_rstn input.

1’b0,1’b1 1’b0

bypass0 Clkout[0] Bypass.

0: clkout[0] driven by PLL output.

1: clkout[0] driven by refclk input.

1’b0,1’b1 1’b0

bypass1 Clkout[1] Bypass.

0: clkout[1] driven by PLL output.

1: clkout[1] driven by refclk input.

1’b0,1’b1 1’b0

1 2 ... 202 203 204 205 206 207 208 209 210 211 212 ... 223 224

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Achronix Speedster22i User Macro Guide Manuale Utente Pagina 207

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