MPC8536E-ANDROID Freescale Semiconductor, MPC8536E-ANDROID Datasheet - Page 290

• 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
8.4.1.4
DDR SDRAM timing configuration register 3, shown in
time, which is combined with TIMING_CFG_1[REFREC] to determine the full refresh recovery time.
Table 8-9
8-16
Offset 0x100
Reset
12–15
16–18
8–11
Bits
0–6
7
W
R
0
EXT_ACTTOPRE Extended Activate to precharge interval (t
EXT_REFREC
—
describes TIMING_CFG_3 fields.
Name
DDR SDRAM Timing Configuration 3 (TIMING_CFG_3)
—
—
—
6
EXT_ACTTOPRE
MPC8536E PowerQUICC III Integrated Processor Reference Manual, Rev. 1
Figure 8-5. DDR SDRAM Timing Configuration 3 (TIMING_CFG_3)
7
Reserved, should be cleared.
activate command until a precharge command is allowed. This field is concatenated with
TIMING_CFG_1[ACTTOPRE] to obtain a 5-bit value for the total activate to precharge. Note that a
5-bit value of 0_0000 is the same as a 5-bit value of 1_0000. Both values represent 16 cycles.
0
Reserved, should be cleared.
Extended refresh recovery time (t
until an activate command is allowed. This field is concatenated with TIMING_CFG_1[REFREC] to
obtain an 8-bit value for the total refresh recovery. Note that hardware adds an additional 8 clock
cycles to the final, 8-bit value of the refresh recovery. t
that t
0000 0 clocks
0001 16 clocks
0010 32 clocks
0011 48 clocks
0100 64 clocks
0101 80 clocks
0110 96 clocks
0111 112 clocks
Reserved, should be cleared.
RFC
0 clocks
Table 8-9. TIMING_CFG_3 Field Descriptions
is calculated as follows:
8
—
11 12
EXT_REFREC
RFC
All zeros
). Controls the number of clock cycles from a refresh command
15 16
Figure
RAS
Description
—
). Determines the number of clock cycles from an
18
8-5, sets the extended refresh recovery
1
1000 128 clocks
1001 144 clocks
1010 160 clocks
1011 176 clocks
1100 192 clocks
1101 208 clocks
1110 224 clocks
1111 240 clocks
EXT_CASLAT
RFC
16 clocks
19
= {EXT_REFREC || REFREC} + 8, such
20
Freescale Semiconductor
—
Access: Read/Write
28 29
CNTL_ADJ
31