M5275EVBE Freescale, M5275EVBE Datasheet - Page 29

• Manufacturer Part Number: M5275EVBE
• Manufacturer: Freescale

Specifications of M5275EVBE

• Lead Free Status / RoHS Status: Compliant

8.8
The DDR SDRAM controller uses SSTL2 and I/O drivers. Class I or Class II drive strength is available
and is user programmable. DDR Clock timing specifications are given in
When using the DDR SDRAM controller the timing numbers in
latch or drive data onto the memory bus. All timing numbers are relative to the two DQS byte lanes.
Freescale Semiconductor
DD10 SD_DQS high to Data invalid (read) - hold
DD11 SD_DQS falling edge to CLKOUT high - setup
DD12 SD_DQS falling edge to CLKOUT high - hold
NUM
DD1
DD2
DD3
DD4
DD5
DD6
DD7
DD8
DD9
1
Symbol
SD V
V
V
V
V
OUT
MP
ID
IX
Frequency of operation
Clock Period (DDR_CLKOUT)
Pulse Width High
Pulse Width Low
DDR_CLKOUT high to DDR address, SD_CKE,
SD_CS[1:0], SD_SCAS, SD_SRAS, SD_WE valid
DDR_CLKOUT high to DDR address, SD_CKE, SD_CS,
SD_SCAS, SD_SRAS, SD_WE invalid
Write command to first SD_DQS Latching Transition
SD_DQS high to Data and DM valid (write) - setup
SD_DQS high to Data and DM invalid (write) - hold
SD_DQS high to Data valid (read) - setup
DDR SDRAM AC Timing Characteristics
SDCLK
SDCLK
DD
is nominally 2.5V.
Clock output mid-point voltage
Clock output voltage level
Clock output differential voltage (peak to peak swing)
Clock crossing point voltage
MCF5275 Integrated Microprocessor Family Hardware Specification, Rev. 4
3
3
Characteristic
2
Table 14. DDR Clock Timing Specifications
Characteristic
Figure 11. DDR Clock Timing Diagram
1
Table 15. DDR Timing
6
7
4,5
4
Symbol
t
t
t
t
DQSS
t
t
t
CMV
CMH
t
CKH
t
t
DSS
DSH
CKl
t
t
CK
QS
QH
IS
IH
Table 15
1.05
1.05
Min
-0.3
0.7
0.25 x t
1
Table 14
must be followed to properly
TBD
0.45
0.45
Min
1.5
0.5
0.5
12
—
—
—
2
1
CK
SDV
SDV
+ 1
Max
1.45
1.45
DD
DD
Electrical Characteristics
and
V
V
V
IX
MP
IX
+ 0.3
+ 0.6
0.5 x t
Figure
Max
TBD
0.55
0.55
1.25
V
83
—
—
—
—
—
—
1
ID
CK
+ 1
11.
Unit
V
V
V
V
MHz
Unit
t
t
t
ns
ns
ns
ns
ns
ns
ns
ns
ns
CK
CK
CK
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