MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 397
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MPC8544COMEDEV
Manufacturer Part Number
MPC8544COMEDEV
Description
KIT DEV EXPRESS MPC8544COM
Manufacturer
Freescale Semiconductor
Type
MPUr
Datasheets
1.MPC8544VTALF.pdf
(117 pages)
2.MPC8544VTALF.pdf
(2 pages)
3.MPC8544VTALF.pdf
(1340 pages)
Specifications of MPC8544COMEDEV
Contents
Board
For Use With/related Products
MPC8544
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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If DDR_SDRAM_CFG_2[SR_IE] is set, the IRQ_OUT signal from the interrupt controller is then
automatically detected by the DDR controller, which immediately causes main memory to enter
self-refresh mode. See
(DDR_SDRAM_CFG_2),”
These fields in the appropriate registers in the PIC must be set for self refresh to function:
See
Section 10.3.7.2, “External Interrupt Destination Registers (EIDR0–EIDR11),”
registers.
Note that this application precludes any other simultaneous use of IRQ_OUT.
9.6.3.2
The DDR controller also has a software-programmable bit, DDR_SDRAM_CFG_2[FRC_SR], that
immediately puts main memory into self-refresh mode. See
Configuration 2 (DDR_SDRAM_CFG_2),”
It is expected that a critical interrupt routine triggered by an external voltage sensing device will have time
to set this bit.
9.6.3.3
The DDR controller offers an initialization bypass feature (DDR_SDRAM_CFG[BI]), which system
designers may use to prevent re-initialization of main memory during system power-on following an
abnormal shutdown. See
for information on this bit and
a discussion of avoiding possible ECC errors in this mode.
Note that the DDR controller will automatically wait 200 DRAM cycles before issuing any command after
the assertion of MCKE[0:3] when this mode is used.
Freescale Semiconductor
•
•
Section 10.3.7.1, “External Interrupt Vector/Priority Registers (EIVPR0–EIVPR11),”
EIVPRn[PRIORITY] should be set to 0xF (highest priority)
EIDRn[EP] should be set in order to route the incoming signal to IRQ_OUT
Software Based Self-Refresh
Bypassing Re-initialization During Battery-Backed Operation
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
Section 9.4.1.8, “DDR SDRAM Control Configuration 2
Section 9.4.1.7, “DDR SDRAM Control Configuration (DDR_SDRAM_CFG),”
for further information on this bit.
Section 9.4.1.15, “DDR Initialization Address (DDR_INIT_ADDR),”
for a description of this register.
Section 9.4.1.8, “DDR SDRAM Control
for descriptions of these
DDR Memory Controller
and
9-73
for
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