mcimx50 Freescale Semiconductor, Inc, mcimx50 Datasheet - Page 69

• Manufacturer Part Number: mcimx50
• Description: I.mx50 Applications Processors For Consumer Products
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
CK >= 200 MHz
CK >= 200 MHz
CK < 200 MHz
CK < 200 MHz
DDR10
DDR11
DDR12
DDR13
DDR14
DDR15
DDR16
DDR15
DDR16
ID
The DDR15,16 could be adjusted by the parameter “DLL_WR_DELAY”;
The ideal case is that SDQS is center aligned to the DRAM_D data valid
window;
For this table, HW_DRAM_PHY15[14:8] (DLL_WR_DELAY) = 0x10;
Positive DQS latching edge to associated CK edge
DQS falling edge from CK rising edge—hold time
DQS falling edge to CK rising edge—setup time
DQS output high pulse width
DQS output low pulse width
DQ & DQM output setup time relative to DQS
DQ & DQM output hold time relative to DQS
DQ & DQM output setup time relative to DQS
DQ & DQM output hold time relative to DQS
i.MX50 Applications Processors for Consumer Products, Rev. 0
Description
Table 44. DDR Output AC Timing
NOTE
Symbol
tDQSS
tDQSH
tDQSL
tDSH
tDSS
tDS
tDH
tDS
tDH
0.48 tCK
0.48 tCK
0.5 tCK
0.5 tCK
0.5 tCK
0.5 tCK
- 0.3
- 0.3
- 1.3
- 1.3
Min
-0.3
1
1
Electrical Characteristics
0.52 tCK
0.52 tCK
0.5 tCK
0.5 tCK
+ 0.3
+ 0.3
Max
0.3
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
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