MPC8379E-RDBA Freescale Semiconductor, MPC8379E-RDBA Datasheet - Page 50
MPC8379E-RDBA
Manufacturer Part Number
MPC8379E-RDBA
Description
BOARD REF DESIGN MPC8379E
Manufacturer
Freescale Semiconductor
Series
PowerQUICC II™ PROr
Type
MPUr
Specifications of MPC8379E-RDBA
Contents
Board
Memory Type
Flash, SDRAM
Interface Type
Ethernet, USB, PCI, UART
Board Size
170 mm x 170 mm
Product
Modules
Silicon Manufacturer
Freescale
Core Architecture
Power Architecture
Core Sub-architecture
PowerQUICC
Silicon Core Number
MPC83xx
Silicon Family Name
PowerQUICC II PRO
Rohs Compliant
Yes
For Use With/related Products
MPC8379E
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Enhanced Secure Digital Host Controller (eSDHC)
11.3.1
Figure 30
11.3.1.1
The following equations show how to calculate the allowed skew range between the SD_CLK and
SD_DAT/CMD signals on the PCB.
Zero clock delay:
With clock delay:
This means that data delay should be equal or less than the clock delay in the ideal case where
t
50
SHSCLKL
t
t
DATA_DELAY
DATA_DELAY
= 10 ns:
provides the data and command output timing diagram.
High-Speed Output Path (Write)
MPC8379E Pins
Output from the
High-Speed Write Meeting Setup (Maximum Delay)
MPC8379E Pin
SD CLK at the
SD Card Pins
the Card Pin
Input at the
SD CLK at
MPC8379E PowerQUICC II Pro Processor Hardware Specifications, Rev. 4
–
–
t
t
t
t
CLK_DELAY
CLK_DELAY
SHSKHOV
Output Valid Time: t
Output Hold Time: t
DATA_DELAY
t
SHSKHOV
+ t
DATA_DELAY
Figure 30. High Speed Output Path
–
< 10
< 0
t
CLK_DELAY
+ t
t
SHSCK
SHSKHOV
SHSKHOX
–
Driving
DATA_DELAY
6
Edge
t
DATA_DELAY
–
4
(Clock Cycle)
+ t
< t
ISU
SHSCKL
< t
+ t
SHSCKL
ISU
–
t
t
< t
CLK_DELAY
ISU
t
ISU
SHSCKL
t
(6 ns)
+ t
SHSCKL
–
CLK_DELAY
t
SHSKHOV
Sampling
Edge
t
IH
(2 ns)
Freescale Semiconductor
Eqn. 10
Eqn. 11
Eqn. 12
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