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LM98725CCMT/NOPB Datasheet(PDF) 21 Page - Texas Instruments |
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LM98725CCMT/NOPB Datasheet(HTML) 21 Page - Texas Instruments |
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21 / 145 page  LM98725 www.ti.com SNAS474H – APRIL 2009 – REVISED MARCH 2015 • Set SSCG Enable (Page 2, Register 0x1A, Bit 0) = 1 (enable spreading, load spreading state machines) • Lock Registers (Page 0, Register 0, Bit 0 = 1) • If spreading is synchronized to SH interval, the spreading function will wait until the next SH Interval before beginning. • Set SSCG Enable (Page 2, Register 0x1A, Bit 0) = 1 (enable spreading, load spreading state machines) • Lock Registers (Page 0, Register 0, Bit 0 = 1) • If spreading is synchronized to SH interval, the spreading function will wait until the next SH Interval before beginning. 7.3.10.4 Changing SSCG Settings To Change SSCG Settings: • Un-Lock Registers ((Page 0, Register 0, Bit 0 = 0) • Set SSCG Enable = 0 (disable spreading) • Change desired SSCG settings. • Set SSCG Enable = 1 (enable spreading, reload spreading state machines) • Lock Registers (Page 0, Register 0, Bit 0 = 1) Table 2. SSCG and Clock Multiplication Register Settings PAGE REGISTER DEFAULT BITS NAME DESCRIPTION 2 24 18 1111 1000 [7:5] Master PLL Range Setting for PLL1 and PLL2 when Autorange is off. Set to 111. [4:3] PLL1 Charge Pump Current Control PLL Control 1 Default = 11 [2:0] PLL1 Filter Bandwidth Control Default = 000 2 25 19 0001 1000 [7:5] Reserved Default = 000 [4:3] PLL2 Charge Pump Current Control Default = 11 PLL Control 2 Set to 00 when using SSCG. [2:0] PLL2 Filter Bandwidth Control Default = 000 Set to 111 when using SSCG. Copyright © 2009–2015, Texas Instruments Incorporated Submit Documentation Feedback 21 Product Folder Links: LM98725 |
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