MPC8308VMAGD Freescale Semiconductor, MPC8308VMAGD Datasheet - Page 372
MPC8308VMAGD
Manufacturer Part Number
MPC8308VMAGD
Description
MPU POWERQUICC II PRO 473MAPBGA
Manufacturer
Freescale Semiconductor
Datasheets
1.MPC8308VMAGD.pdf
(90 pages)
2.MPC8308VMAGD.pdf
(2 pages)
3.MPC8308VMAGD.pdf
(1170 pages)
4.MPC8308VMAGD.pdf
(14 pages)
Specifications of MPC8308VMAGD
Processor Type
MPC83xx PowerQUICC II Pro 32-Bit
Speed
400MHz
Voltage
1V
Mounting Type
Surface Mount
Package / Case
473-MAPBGA
Product
Network Processor
Data Rate
256 bps
Frequency
400 MHz
Supply Voltage (max)
3.6 V
Supply Voltage (min)
3 V
Supply Current (max)
5 uA
Maximum Operating Temperature
+ 105 C
Minimum Operating Temperature
0 C
Interface
I2C, JTAG, SPI
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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DDR Memory Controller
Table 9-43
Note that in the absence of refresh support, system software must preserve DDR SDRAM data (such as by
copying the data to disk) before entering the power-saving mode.
The dynamic power-saving mode uses the CKE DDR SDRAM pin to dynamically power down when there
is no system memory activity. The CKE pin is negated when both of the following conditions are met:
CKE is reasserted when a new access or refresh is scheduled or the dynamic power mode is disabled. This
mode is controlled with DDR_SDRAM_CFG[DYN_PWR_MGMT].
Dynamic power management mode offers tight control of the memory system’s power consumption by
trading power for performance through the use of CKE. Powering up the DDR SDRAM when a new
memory reference is scheduled causes an access latency penalty, depending on whether active or precharge
powerdown is used, along with the settings of TIMING_CFG_0[ACT_PD_EXIT] and
TIMING_CFG_0[PRE_PD_EXIT]. A penalty of 1 cycle is shown in
9-54
•
•
No memory refreshes are scheduled
No memory accesses are scheduled
summarizes the refresh types available in each power-saving mode.
Table 9-43. DDR SDRAM Power-Saving Modes Refresh Configuration
Mem Bus Clock
MPC8308 PowerQUICC II Pro Processor Reference Manual, Rev. 0
COMMAND
CKE
Figure 9-42. DDR SDRAM Power-Down Mode
Power Saving Mode
Sleep
NOP
Refresh Type
None
Self
SREN
—
Figure
1
NOP
9-42.
ACT
Freescale Semiconductor
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