MPC8313EZQADDC Freescale Semiconductor, MPC8313EZQADDC Datasheet - Page 440
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MPC8313EZQADDC
Manufacturer Part Number
MPC8313EZQADDC
Description
Microprocessors - MPU 8313 REV2.2 PB W/ENC
Manufacturer
Freescale Semiconductor
Datasheet
1.MPC8313CZQADDC.pdf
(1214 pages)
Specifications of MPC8313EZQADDC
Processor Series
MPC8313E
Core
e300
Data Bus Width
16 bit
Maximum Clock Frequency
133 MHz
Program Memory Size
16 KB
Data Ram Size
16 KB
Interface Type
I2C
Mounting Style
SMD/SMT
Package / Case
PBGA
Number Of Programmable I/os
32
Number Of Timers
4
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DDR Memory Controller
Table 9-32
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
9-46
•
•
No memory refreshes are scheduled
No memory accesses are scheduled
summarizes the refresh types available in each power-saving mode.
MPC8313E PowerQUICC™ II Pro Integrated Processor Family Reference Manual, Rev. 2
Table 9-32. DDR SDRAM Power-Saving Modes Refresh Configuration
Mem Bus Clock
COMMAND
CKE
Figure 9-31. DDR SDRAM Power-Down Mode
Power Saving Mode
Sleep
NOP
Refresh Type
None
Self
SREN
—
Figure
1
NOP
9-31.
ACT
Freescale Semiconductor
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