参数资料
型号: MPC8308-KIT
厂商: Freescale Semiconductor
文件页数: 71/83页
文件大小: 0K
描述: KIT EVALUATION FOR MPC830X
标准包装: 1
系列: PowerQUICC II™ PRO
类型: MPU
适用于相关产品: MPC8308
所含物品: 板,线缆,CD,电源
MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 3
Freescale Semiconductor
73
Clocking
This table provides the operating frequencies for the device under recommended operating conditions
21.2
System PLL Configuration
The system PLL is controlled by the RCWL[SPMF] parameter. This table shows the multiplication factor
encodings for the system PLL.
As described in Section 21, “Clocking,” the LBCM, DDRCM, and SPMF parameters in the reset
configuration word low select the ratio between the primary clock input (SYS_CLK_IN) and the internal
coherent system bus clock (csb_clk). This table shows the expected frequency values for the CSB
frequency for select csb_clk to SYS_CLK_IN ratios.
Table 55. Operating Frequencies for MPC8308
Characteristic1
Maximum Operating Frequency
Unit
e300 core frequency (core_clk)
400
MHz
Coherent system bus frequency (csb_clk)
133
MHz
DDR2 memory bus frequency (MCK)2
133
MHz
Local bus frequency (LCLK0)3
66
MHz
Notes:
1. The SYS_CLK_IN frequency, RCWL[SPMF], and RCWL[COREPLL] settings must be chosen such that the resulting csb_clk,
MCK, LCLK0, and core_clk frequencies do not exceed their respective maximum or minimum operating frequencies.
2. The DDR data rate is 2x the DDR memory bus frequency.
3. The local bus frequency is 1/2, 1/4, or 1/8 of the lbc_clk frequency (depending on LCCR[CLKDIV]) which is in turn, 1x or 2x
the csb_clk frequency (depending on RCWL[LBCM]).
Table 56. System PLL Ratio
RCWL[SPMF]
csb_clk: SYS_CLK_IN
0000
Reserved
0001
Reserved
0010
2 : 1
0011
3 : 1
0100
4 : 1
0101
5 : 1
0110–1111
Reserved
Table 57. CSB Frequency Options
SPMF
csb_clk :Input Clock Ratio
Input Clock Frequency (MHz)
25
33.33
66.67
0010
2:1
133
0100
4:1
133
0101
5:1
125
167
相关PDF资料
PDF描述
EBA22DTMH CONN EDGECARD 44POS R/A .125 SLD
EBA22DTMD CONN EDGECARD 44POS R/A .125 SLD
EBM36DCSN CONN EDGECARD 72POS DIP .156 SLD
EBA22DTBN CONN EDGECARD 44POS R/A .125 SLD
EBM36DCSH CONN EDGECARD 72POS DIP .156 SLD
相关代理商/技术参数
参数描述
MPC8308-NSG 功能描述:开发板和工具包 - 其他处理器 MPC8308-NSG RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压:
MPC8308-NSG 制造商:Freescale Semiconductor 功能描述:MPC8308-NSG*NIC*
MPC8308-RDB 功能描述:开发板和工具包 - 其他处理器 Refer. Board MPC8308 RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压:
MPC8308-RDB-PROMO 制造商:Freescale 功能描述:Motherboards MPC8308 PowerQuicc II DDR2 10Mbps/100Mbps/1000Mbps Linux Kernel
MPC8308-SOM 功能描述:开发板和工具包 - 其他处理器 For MPC8308 Ethernet USB 32bit RoHS:否 制造商:Freescale Semiconductor 产品:Development Systems 工具用于评估:P3041 核心:e500mc 接口类型:I2C, SPI, USB 工作电源电压: