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TMS320C6472ECTZ 데이터시트(PDF) 155 Page - Texas Instruments |
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TMS320C6472ECTZ 데이터시트(HTML) 155 Page - Texas Instruments |
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155 / 269 page ![]() TMS320C6472 www.ti.com SPRS612G – JUNE 2009 – REVISED JULY 2011 7.8.3.4 PLL1 PLL Multiply Control Register (PLLM) The PLL multiplier control register (PLLM) defines the input reference clock frequency multiplier. The multiplier should be chosen such that the output frequency should not exceed device frequency; i.e., no more than 700 MHz for the 700-MHz device. The PLLM register is shown in Figure 7-16 and described in Table 7-23. 31 5 4 0 Reserved PLLM R-0 R/W-13h LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Figure 7-17. PLL Multiply Control Register (PLLM) Table 7-23. PLL Multiply Control Register (PLLM) Field Descriptions Bit Field Value Description 31:5 Reserved Reserved. 4:0 PLLM PLL1 Multiplier Bits Defines the frequency multiplier of the input reference clock (CLKIN1). 09h - 1Fh x10 - x32 multiplier rate (multiplier is value + 1) 7.8.3.5 PLL1 PLL Controller Divider Register (PLLDIV10) The (SYSREFCLK) frequency is divided by PLLDIV10 to get SYSCLK10. The PLL controller divider register (PLLDIV10) is shown in Figure 7-18 and described in Table 7-24. 31 16 Reserved R-0 15 14 5 4 0 DnEN Reserved RATIO R/W-1 R-0 R/W-3 LEGEND: R/W = Read/Write; R = Read only; -n = value after reset Figure 7-18. PLL Controller Divider Register (PLLDIV10) Table 7-24. PLL Controller Divider Register (PLLDIV10) Field Descriptions Bit Field Value Description 31:16 Reserved 0 Reserved. The reserved bit location is always read as 0. A value written to this field has no effect. 15 DnEN Divider Dn enable bit. 0 Divider n is disabled. No clock output. 1 Divider n is enabled. 14:5 Reserved 0 Reserved. The reserved bit location is always read as 0. A value written to this field has no effect. 4:0 RATIO 0-1Fh Divider ratio bits. 0 Reserved 1h Reserved 2h-1Fh ÷3 to ÷32. Divide frequency by 3 to divide frequency by 32. Copyright © 2009–2011, Texas Instruments Incorporated C64x+ Peripheral Information and Electrical Specifications 155 Submit Documentation Feedback Product Folder Link(s) :TMS320C6472 |
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