参数资料
型号: MPC8349E-MITX-GP
厂商: Freescale Semiconductor
文件页数: 27/36页
文件大小: 0K
描述: KIT REFERENCE PLATFORM MPC8349E
标准包装: 1
系列: PowerQUICC II™ PRO
类型: MPU
适用于相关产品: MPC8349E
所含物品: 模块和其他硬件
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MPC8349E-mITX-GP Board
Figure 20 shows the power supply block diagram.
MIC2505
MAX1953
5V
USB VBUS Power
1.2 V
5 V input
5V
CPU Fan
MPC8349E Vcore
3.3 V input
MIC29302
2.5 V
DDR
3.3 V
Figure 20. Power Supply Circuitry
The core supply voltage and I/O supply voltages do not have to be applied in any particular order. During
the power ramp up, before the power supplies are stable, there may be an interval when the I/O pins are
actively driven. After power is stable, as long as PORESET is asserted, most I/O pins are three-stated. To
minimize the time I/O pins are actively driven, apply core voltage before I/O voltage and assert PORESET
before the power supplies fully ramp up. In general, for a dual-supply voltage device, minimize the voltage
difference between the V core and V I/O during ramp-up and power-down.
1.6.6
Chip-Select Assignments and Memory Map
Table 17 shows an example memory map on the MPC8349E that is used for u-boot 1.1.3 in the Flash
memory.
Table 17. Example Memory Map, Local Access Window, and Chip-Select Assignments
Address Range
0x0000_0000–0x4000_0000
Target Interface
DDR
Chip-Select
Line
MCS0/MCS1
Device Name
DDR SDRAM (256 Mbytes– 1
Port Size (Bits)
64
Gbyte)
0x8000_0000–0x9FFF_FFFF
0xE200_0000–0xE2FF_FFFF
0xA000_0000–0xBFFF_FFFF
0xE300_0000–0xE3FF_FFFF
0xF000_0000–0xF000_FFFF
0xF900_0000–0xF91F_FFFF
0xF800_0000–0xF801_FFFF
0xE000_0000–0xEFFF_FFFF
PCI1
PCI1
PCI2
PCI2
Local bus
Local bus
Local bus
Internal bus
Nil
Nil
Nil
Nil
LCS3
LCS2
LCS1
Nil
PCI1 memory space (512 Mbyte)
PCI1 I/O space (16 Mbyte)
PCI2 memory space (512 Mbyte)
PCI2 I/O space (16 Mbyte)
Reserved
Reserved
Reserved
IMMR (1 Mbyte)
32
32
32
32
8
8
8
MPC8349E-mITX-GP Reference Design Platform User’s Guide, Rev. 0
Freescale Semiconductor
Preliminary—Subject to Change Without Notice
27
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