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参数资料
| 型号： | MPC8315VRAGDA |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 400 MHz, MICROPROCESSOR, PBGA620 |
| 封装： | 29 X 29 MM, 2.23 MM HEIGHT, 1 MM PITCH, LEAD FREE, TEPBGAII-620 |
| 文件页数： | 12/112页 |
| 文件大小： | 1283K |
| 代理商： | MPC8315VRAGDA |
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MPC8315E PowerQUICC II Pro Processor Hardware Specifications, Rev. 0
Freescale Semiconductor
109
Ordering Information
26.6
Configuration Pin Multiplexing
The MPC8315E provides the user with power-on configuration options that can be set through the use of
external pull-up or pull-down resistors of 4.7 k
Ω on certain output pins (see customer visible configuration
pins). These pins are generally used as output only pins in normal operation.
While HRESET is asserted however, these pins are treated as inputs. The value presented on these pins
while HRESET is asserted, is latched when PORESET deasserts, at which time the input receiver is
disabled and the I/O circuit takes on its normal function. Careful board layout with stubless connections
to these pull-up/pull-down resistors coupled with the large value of the pull-up/pull-down resistor should
minimize the disruption of signal quality or speed for output pins thus configured.
26.7
Pull-Up Resistor Requirements
The MPC8315E requires high resistance pull-up resistors (10 k
Ω is recommended) on open drain type pins
including I2C pins, Ethernet Management MDIO pin and EPIC interrupt pins.
For more information on required pull up resistors and the connections required for JTAG interface, see
AN3438, MPC8315 Design Checklist
27
Ordering Information
Ordering information for the parts fully covered by this specification document is provided in
27.1
Part Numbers Fully Addressed by this Document
Table 81 provides the Freescale part numbering nomenclature for the MPC8315E. Note that the individual
part numbers correspond to a maximum processor core frequency. For available frequencies, contact your
local Freescale sales office. In addition to the processor frequency, the part numbering scheme also
includes an application modifier which may specify special application conditions. Each part number also
contains a revision code which refers to the die mask revision number.
Table 80. Impedance Characteristics
Impedance
Local Bus, Ethernet,
DUART, Control,
Configuration, Power
Management
PCI Signals
(Not Including PCI
Output Clocks)
PCI Output Clocks
(Including
PCI_SYNC_OUT)
DDR DRAM
Symbol
Unit
RN
42 Target
25 Target
42 Target
20 Target
Z0
Ω
RP
42 Target
25 Target
42 Target
20 Target
Z0
Ω
Differential
NA
ZDIFF
Ω
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