參數(shù)資料
型號: MPC8349ECVVAGFB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 400 MHz, MICROPROCESSOR, PBGA672
封裝: 35 X 35 MM, 1.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, TBGA-672
文件頁數(shù): 66/87頁
文件大?。?/td> 1037K
代理商: MPC8349ECVVAGFB
MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 12
Freescale Semiconductor
69
Clocking
As described in Section 19, “Clocking,” the LBIUCM, DDRCM, and SPMF parameters in the reset
configuration word low and the CFG_CLKIN_DIV configuration input signal select the ratio between the
primary clock input (CLKIN or PCI_CLK) and the internal coherent system bus clock (csb_clk). Table 59
and Table 60 show the expected frequency values for the CSB frequency for select csb_clk to
CLKIN/PCI_SYNC_IN ratios.
0111
× 7
1000
× 8
1001
× 9
1010
× 10
1011
× 11
1100
× 12
1101
× 13
1110
× 14
1111
× 15
Table 59. CSB Frequency Options for Host Mode
CFG_CLKIN_DIV
at Reset1
SPMF
csb_clk :
Input Clock Ratio2
Input Clock Frequency (MHz)2
16.67
25
33.33
66.67
csb_clk Frequency (MHz)
Low
0010
2 : 1
133
Low
0011
3 : 1
100
200
Low
0100
4 : 1
100
133
266
Low
0101
5 : 1
125
166
333
Table 58. System PLL Multiplication Factors (continued)
RCWL[SPMF]
System PLL Multiplication Factor
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