参数资料
型号: MPC8314VRAGDA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: MICROPROCESSOR, PBGA620
封装: 29 X 29 MM, LEAD FREE, PLASTIC, TEPBGA-620
文件页数: 101/106页
文件大小: 1253K
代理商: MPC8314VRAGDA
MPC8314E PowerQUICC II Pro Processor Hardware Specifications, Rev. 0
94
Freescale Semiconductor
Clocking
As described in Section 23, “Clocking,” The LBIUCM, DDRCM, and SPMF parameters in the reset
configuration word low and the CFG_SYS_CLKIN_DIV configuration input signal select the ratio
between the primary clock input (SYS_CLKIN or PCI_CLK) and the internal coherent system bus clock
(csb_clk). Table 70 and Table 71 shows the expected frequency values for the CSB frequency for select
csb_clk to SYS_CLKIN/PCI_SYNC_IN ratios.
Table 69. System PLL Multiplication Factors
RCWL[SPMF]
System PLL
Multiplication Factor
0000
Reserved
0001
Reserved
0010
× 2
0011
× 3
0100
× 4
0101
× 5
0110–1111
Reserved
Table 70. CSB Frequency Options for Host Mode
CFG_SYS_CLKIN_DIV
at Reset1
1 CFG_SYS_CLKIN_DIV select the ratio between SYS_CLKIN and PCI_SYNC_OUT.
SPMF
csb_clk :
Input Clock
Ratio 2
2 SYS_CLKIN is the input clock in host mode; PCI_CLK is the input clock in agent mode.
Input Clock
Frequency (MHz)2
24
33.33
66.67
High/Low 3
3 In the Host mode it does not matter if the value is High or Low.
0010
2:1
133
High/Low
0011
3:1
100
High/Low
0100
4:1
96
133
High/Low
0101
5:1
120
Table 71. CSB Frequency Options for Agent Mode
CFG_SYS_CLKIN_DIV
at Reset1
1 CFG_SYS_CLKIN_DIV doubles csb_clk if set low.
SPMF
csb_clk :
Input Clock
Ratio 2
2 SYS_CLKIN is the input clock in host mode; PCI_CLK is the input clock in agent mode.
Input Clock
frequency (MHz)2
25
33.33
66.67
High
0010
2: 1
133
High
0011
3: 1
100
High
0100
4: 1
133
High
0101
5: 1
120
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