参数资料
型号: MPC8379EVRAJFA
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 333 MHz, MICROPROCESSOR, PBGA689
封装: 31 X 31 MM, 2.46 MM HEIGHT, 1 MM PITCH, LEAD FREE, PLASTIC, BGA-689
文件页数: 112/114页
文件大小: 1337K
代理商: MPC8379EVRAJFA
MPC8379E PowerQUICC II Pro Processor Hardware Specifications, Rev. 2
Freescale Semiconductor
97
Clocking
Table 70 provides the operating frequencies for the TePBGA II package under recommended operating
conditions (see Table 3).
22.1
System PLL Configuration
The system PLL is controlled by the RCWL[SPMF] parameter. The system PLL VCO frequency depends
on RCWL[DDRCM] and RCWL[LBCM]. Table 71 shows the multiplication factor encodings for the
system PLL.
NOTE
If RCWL[DDRCM] and RCWL[LBCM] are both cleared, the system PLL
VCO frequency = (CSB frequency)
× (System PLL VCO Divider).
If either RCWL[DDRCM] or RCWL[LBCM] are set, the system PLL VCO
frequency = 2
× (CSB frequency) × (System PLL VCO Divider).
The VCO divider needs to be set properly so that the System PLL VCO
frequency is in the range of 400–800 MHz.
Table 70. Operating Frequencies for TePBGA II
Parameter 1
1
The CLKIN frequency, RCWL[SPMF], and RCWL[COREPLL] settings must be chosen such that the resulting
csb_clk, MCK,
LCLK[0:2], and
core_clk frequencies do not exceed their respective maximum or minimum operating frequencies. The value
of SCCR[xCM] must be programmed such that the maximum internal operating frequency of the Security core, USB modules,
SATA, and eSDHC will not exceed their respective value listed in this table.
Minimum Operating
Frequency (MHz)
Maximum Operating
Frequency (MHz)
e300 core frequency (
core_clk)
333
800
Coherent system bus frequency (
csb_clk)
133
400
DDR2 memory bus frequency (MCK) 2
2
The DDR data rate is 2
× the DDR memory bus frequency.
125
200
DDR1 memory bus frequency (MCK) 2
167
333
Local bus frequency (LCLK
n) 3
3
The local bus frequency is 1/2, 1/4, or 1/8 of the
lbiu_clk frequency (depending on LCCR[CLKDIV]) which is in turn 1x or 2x
the
csb_clk frequency (depending on RCWL[LBIUCM]).
—133
Local bus controller frequency (
lbc_clk)—
400
PCI input frequency (CLKIN or PCI_CLK)
25
66
eTSEC frequency
400
Security encryption controller frequency
200
USB controller frequency
200
eSDHC controller frequency
200
SATA controller frequency
200
Note:
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