Texas Instruments AM18x eXperimenter's Kit TMDSEXP1808L TMDSEXP1808L Datenbogen
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TMDSEXP1808L
SPRS653E – FEBRUARY 2010 – REVISED MARCH 2014
6.11 DDR2/mDDR Memory Controller
The DDR2/mDDR Memory Controller is a dedicated interface to DDR2/mDDR SDRAM. It supports
JESD79-2A standard compliant DDR2 SDRAM devices and compliant Mobile DDR SDRAM devices.
JESD79-2A standard compliant DDR2 SDRAM devices and compliant Mobile DDR SDRAM devices.
The DDR2/mDDR Memory Controller support the following features:
•
JESD79-2A standard compliant DDR2 SDRAM
•
Mobile DDR SDRAM
•
256 MByte memory space for DDR2
•
256 MByte memory space for mDDR
•
CAS latencies:
–
–
DDR2: 2, 3, 4 and 5
–
mDDR: 2 and 3
•
Internal banks:
–
–
DDR2: 1, 2, 4 and 8
–
mDDR:1, 2 and 4
•
Burst length: 8
•
Burst type: sequential
•
1 chip select (CS) signal
•
Page sizes: 256, 512, 1024 and 2048
•
SDRAM autoinitialization
•
Self-refresh mode
•
Partial array self-refresh (for mDDR)
•
Power down mode
•
Prioritized refresh
•
Programmable refresh rate and backlog counter
•
Programmable timing parameters
•
Little endian
6.11.1 DDR2/mDDR Memory Controller Electrical Data/Timing
Table 6-20. Switching Characteristics Over Recommended Operating Conditions for DDR2/mDDR
Memory Controller
No.
PARAMETER
1.3V, 1.2V
1.1V
1.0V
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
DDR2
125
156
125
150
—
(1)
—
(1)
Cycle time,
1
t
c(DDR_CLK)
MHz
DDR_CLKP / DDR_CLKN
mDDR
105
150
100
133
95
133
(1)
DDR2 is not supported at this voltage operating point.
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Peripheral Information and Electrical Specifications
109
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