MPC8536E-ANDROID Freescale Semiconductor, MPC8536E-ANDROID Datasheet - Page 348

• Manufacturer Part Number: MPC8536E-ANDROID
• Description: HARDWARE/SOFTWARE ANDROID OS
• Manufacturer: Freescale Semiconductor
• Series: PowerQUICC ™r
• Type: MPUr

Specifications of MPC8536E-ANDROID

• Contents: Board
• For Use With/related Products: MPC8536
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DDR Memory Controller
The value of the above parameters (in whole clock cycles) must be set by boot code at system start-up (in
the TIMING_CFG_0, TIMING_CFG_1, TIMING_CFG_2, and TIMING_CFG_3 registers as described
in
SDRAM Timing Configuration 1 (TIMING_CFG_1),” Section 8.4.1.7, “DDR SDRAM Timing
Configuration 2 (TIMING_CFG_2),”
(TIMING_CFG_3)”) and be kept in the DDR memory controller configuration register space.
The following figures show SDRAM timing for various types of accesses. System software is responsible
(at reset) for optimally configuring SDRAM timing parameters. The programmable timing parameters
apply to both read and write timing configuration. The configuration process must be completed and the
DDR SDRAM initialized before any accesses to SDRAM are attempted.
Figure 8-49
for a single-beat read operation,
word write operation. Note that all signal transitions occur on the rising edge of the memory bus clock and
that single-beat read operations are identical to burst-reads. These figures assume the CLK_ADJUST is
set to 1/2 DRAM cycle, an additive latency of 0 DRAM cycles is used, and the write latency is 1 DRAM
cycle.
8-74
Section 8.4.1.5, “DDR SDRAM Timing Configuration 0 (TIMING_CFG_0),” Section 8.4.1.6, “DDR
SDRAM Clock
through
Figure 8-49. DDR SDRAM Burst Read Timing—ACTTORW = 3, MCAS Latency = 2
MDQS
MRAS
MCAS
MDQ n
MWE
MCS
MA n
MPC8536E PowerQUICC III Integrated Processor Reference Manual, Rev. 1
Figure 8-51
ROW
0
Figure 8-50
1
show DDR SDRAM timing for various types of accesses; see
ACTTORW
2
and
COL
Section 8.4.1.4, “DDR SDRAM Timing Configuration 3
3
for a single-beat write operation, and
CASLAT
4
COL
5
D0
D1 D2 D3
6
7
D0
D1 D2
8
D3
9
10
Figure 8-51
Freescale Semiconductor
11
12
for a double
Figure 8-49