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FS7140-01 Datasheet(PDF) 10 Page - AMI SEMICONDUCTOR |
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FS7140-01 Datasheet(HTML) 10 Page - AMI SEMICONDUCTOR |
10 / 15 page ![]() 10 AMI Semiconductor - Rev. 3.0 www.amis.com FS7140-01 / FS7140-01g / FS7145 Programmable Phase-Locked Loop Clock Generator Data Sheet Table 9: Post Divider Control Bits Name Description POST1[3:0] POST Divider #1 (NP1) Modulus [0000] 1 [0001] 2 [0010] 3 [0011] 4 [0100] 5 [0101] 6 [0110] 7 [0111] 8 [1000] 9 [1001] 10 [1010] 11 [1011] 12 [1100] Do not use [1101] [1110] [1111] POST2[3:0] POST Divider #2 (NP2) Modulus [0000] 1 [0001] 2 [0010] 3 [0011] 4 [0100] 5 [0101] 6 [0110] 7 [0111] 8 [1000] 9 [1001] 10 [1010] 11 [1011] 12 [1100] Do not use [1101] [1110] [1111] POST3[1:0] POST Divider #3 (NP3) Modulus [00] 1 [01] 2 [10] 4 [11] 8 Table 7: PLL Divider Control Bits NAME DESCRIPTION REFDIV[11:0] REFerence DIVider (NR) FBKDIV[13:0] FeedBacK DIVider (NR) Table 8: SYNC Control Bits (FS7145 only) Name Description SYNCEN SYNC Enable [0] = Disabled / [1] = Enabled SYNCPOL SYNC POLarity [0] = Negative Edge / [1] = Positive Edge Table 5: Device Configuration Bits Name Description REFDSRC REFerence Divider SouRCe [0] = Crystal Oscillator / [1] = REF Pin FBKDSRC FeedB ack Divider SouRCe [0] = VCO Output / [1] = Post Divider Output SHUT1 SHUTdown1 [0] = Normal / [1] = Powered Down SHUT2 SHUTdown2 [0] = Normal / [1] = Powered Down CMOS CLKP/CLKN Output Mode [0] = PECL Output / [1] CMOS Output Table 6: Main Loop Tuning Bits Name Description CP[1:0] Charge Pump Current [00] 2.0 mA [01] 4.5 mA [10] 11.0 mA [11] 22.5 mA LR[1:0] Loop Filter Resistor Select [00] 400K W [01] 133K W [10] 30K W [11] 12K W LC Loop Filter Capacitor Select [0] 185pF [1] 500pF |
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