MPC8536E-ANDROID Freescale Semiconductor, MPC8536E-ANDROID Datasheet - Page 346
![no-image](/images/manufacturer_photos/0/2/262/freescale_semiconductor_sml.jpg)
MPC8536E-ANDROID
Manufacturer Part Number
MPC8536E-ANDROID
Description
HARDWARE/SOFTWARE ANDROID OS
Manufacturer
Freescale Semiconductor
Series
PowerQUICC ™r
Type
MPUr
Datasheets
1.MPC8536EBVTAVLA.pdf
(127 pages)
2.MPC8536EBVTAVLA.pdf
(2 pages)
3.MPC8536EBVTAVLA.pdf
(1706 pages)
Specifications of MPC8536E-ANDROID
Contents
Board
For Use With/related Products
MPC8536
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 346 of 1706
- Download datasheet (15Mb)
DDR Memory Controller
8.5.4
The DDR memory controller supports four-beat bursts to SDRAM. For single-beat reads, the DDR
memory controller performs a four- (or eight-) beat burst read, but ignores the last three (or seven) beats.
8-72
Activate
Precharge select
logical bank
Precharge all logical
banks
Read
Read with
auto-precharge
Write
Write with
auto-precharge
Mode register set
Auto refresh
Self refresh
•
•
Operation
also supports posted refreshes, where several refreshes may be executed at once, and the refresh
interval may be extended.
Mode register set (for configuration)—Allows setting of DDR SDRAM options. These options are:
MCAS latency, additive latency (for DDR2), write recovery (for DDR2), burst type, and burst
length. MCAS latency may be chosen as provided by the preferred SDRAM (some SDRAMs
provide MCAS latency {1,2,3}, some provide MCAS latency {1,2,3,4,5}, and so on). Burst type
is always sequential. Although some SDRAMs provide burst lengths of 1, 2, 4, 8, and page size,
this memory controller supports a burst length of 4. A burst length of 8 is supported for
DDR3memory only. For DDR2 in 32-bit bus mode, all 32-byte burst accesses from the platform
are split into two 16-byte (that is, 4-beat) accesses to the SDRAMs in the memory controller. The
mode register set command is performed by the DDR memory controller during system
initialization. Parameters such as mode register data, MCAS latency, burst length, and burst type,
are set by software in DDR_SDRAM_MODE[SDMODE] and transferred to the SDRAM array by
the DDR memory controller after DDR_SDRAM_CFG[MEM_EN] is set. If
DDR_SDRAM_CFG[BI] is set to bypass the automatic initialization, then the MODE registers can
be configured through software through use of the DDR_SDRAM_MD_CNTL register.
Self refresh (for long periods of standby)—Used when the device is in standby for very long
periods of time. Automatically generates internal refresh cycles to keep the data in all memory
banks refreshed. Before execution of this command, the DDR controller places all logical banks in
a precharged state.
DDR SDRAM Interface Timing
MPC8536E PowerQUICC III Integrated Processor Reference Manual, Rev. 1
Prev.
CKE
H
H
H
H
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H
H
Current
CKE
H
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L
Table 8-61. DDR SDRAM Command Table
MCS MRAS MCAS MWE
L
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L
L
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L
H
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H
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H
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H
L
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L
Logical bank select
Logical bank select
Logical bank select
Logical bank select
Logical bank select
Logical bank select
Opcode
MBA
X
X
X
Opcode Opcode and mode
MA10
Row
H
H
H
X
X
L
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L
Freescale Semiconductor
Column
Column
Column
Column
Row
MA
X
X
X
X
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