mpc5200cvr400br2 Freescale Semiconductor, Inc, mpc5200cvr400br2 Datasheet - Page 24

• Manufacturer Part Number: mpc5200cvr400br2
• Description: Mpc5200b 32-bit Embedded Processor
• Manufacturer: Freescale Semiconductor, Inc

Electrical and Thermal Characteristics
3.3.5.4
3.3.6
The PCI interface on the MPC5200B is designed to PCI Version 2.2 and supports 33-MHz and 66-MHz
PCI operations. See the PCI Local Bus Specification [4]; the component section specifies the electrical and
timing parameters for PCI components with the intent that components connect directly together whether
on the planar or an expansion board, without any external buffers or other “glue logic.” Parameters apply
at the package pins, not at expansion board edge connectors.
The MPC5200B is always the source of the PCI CLK. The clock waveform must be delivered to each
33-MHz or 66-MHz PCI component in the system.
measurement points for 3.3 V signaling environments.
24
MDQS (Data Strobe)
NOTE: Control Signals signals are composed of RAS, CAS, MEM_WE, MEM_CS, MEM_CS1 and CLK_EN
data
t
data
mem_clk
t
Control Signals
Sym
DQSS
valid
hold
MDQ (Data)
MEM_CLK
MEM_CLK
PCI
Memory Interface Timing-DDR SDRAM Write Command
MEM_CLK period
Delay from write command to first
rising edge of MDQS
MDQ valid before rising edge of
MDQS
MDQ valid after rising edge of
MDQS
Write
Description
t
DQSS
Table 21. DDR SDRAM Memory Write Timing
Figure 8. DDR SDRAM Memory Write Timing
Write
MPC5200B Data Sheet, Rev. 1
Figure 9
TBD
Min
7.5
—
Table 22
Write
shows the clock waveform and required
summarizes the clock specifications.
t
mem_clk
Write
TBD
Max
—
+0.4
Freescale Semiconductor
Units
ns
ns
ns
ns
SpecID
A5.20
A5.21
A5.22
A5.23