Electronic Component Distributor. Source::Freescale Semiconductor
P.N:MPC8349CZUAGDB Desc:IC MPU POWERQUICC II PRO 672TBGA
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MPC8349EA PowerQUICC II Pro Integrated Host Processor Hardware Specifications, Rev. 13
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 Reset
1
SPMF
csb_clk
:
Input Clock Ratio
2
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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