Achronix Speedster22i User Macro Guide Uživatelský manuál stáhnout pdf (Strana 210)

PLL/DLL Clock Generators ACX_CLKGEN

Speedster Macro Cell Library

www.achronix.com PAGE 193

high_cnt2 The output synthesizer divides the PLL output clock by

'high_cnt2 + low_cnt2'. The ratio of high_cnt2 to

'high_cnt2 + low_cnt2' determines the output duty

cycle.

10’h000-10’h3FF 10’h0

low_cnt2 If set to 0, the output synthesizer is bypassed. Other-

wise, the output synthesizer divides the PLL output

clock by 'high_cnt2 + low_cnt2'. The ratio of high_cnt2

to 'high_cnt2 + low_cnt2' determines the output duty

cycle.

10’h000-10’h3FF 10’h0

high_cnt3 The output synthesizer divides the PLL output clock by

'high_cnt3 + low_cnt3'. The ratio of high_cnt3 to

low_cnt3 determines the output duty cycle.

10’h000-10’h3FF 10’h0

low_cnt3 The output synthesizer divides the PLL output clock by

'high_cnt3 + low_cnt3'. The ratio of high_cnt3 to

'high_cnt3 + low_cnt3' determines the output duty

cycle.

10’h000-10’h3FF 10’h0

half_cycle0 If set to 1, it extends the high pulse width of clkout[0] by

1/2 the clkout[0] cycle.

1’b0,1’b1 1’b0

half_cycle1 If set to 1, it extends the high pulse width of clkout[1] by

1/2 the clkout[1] cycle.

1’b0,1’b1 1’b0

half_cycle2 If set to 1, it extends the high pulse width of clkout[2] by

1/2 the clkout[2] cycle.

1’b0,1’b1 1’b0

half_cycle3 If set to 1, it extends the high pulse width of clkout[3] by

1/2 the clkout[3] cycle.

1’b0,1’b1 1’b0

clken_out0 Clkout[0] Clock Gating Enable.

0: Disable core_clken[0] input.

1: Enable core_clken[0] input.

1’b0,1’b1 1’b0

clken_out1 Clkout[1] Clock Gating Enable.

0: Disable core_clken[1] input.

1: Enable core_clken[1] input.

1’b0,1’b1 1’b0

clken_out2 Clkout[2] Clock Gating Enable.

0: Disable core_clken[2] input.

1: Enable core_clken[2] input.

1’b0,1’b1 1’b0

clken_out3 Clkout[3] Clock Gating Enable.

0: Disable core_clken[3] input.

1: Enable core_clken[3] input.

1’b0,1’b1 1’b0

Parameter Description Defined Values

Default

Value

1 2 ... 205 206 207 208 209 210 211 212 213 214 215 ... 223 224

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