MPC8544COMEDEV Freescale Semiconductor, MPC8544COMEDEV Datasheet - Page 674
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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Local Bus Controller
14.4.3.7.5
This parameter, controlled by LSDMR[RFRC], defines the earliest timing for an ACTIVATE or
REFRESH command after a REFRESH command to the same SDRAM device.
14.4.3.7.6
If the additional delay of any buffers placed on the command strobes (LSDRAS, LSDCAS, LSDWE, and
LSDA10), is endangering the device setup time, LSDMR[BUFCMD] should be set. Setting this bit causes
the memory controller to add LCRR[BUFCMDC] extra bus cycles to the assertion of SDRAM control
signals (LSDRAS, LSDCAS, LSDWE, and LSDA10) for each SDRAM command.
14-54
LSDDQM[0:3]
LSDDQM
LSDRAS
LSDCAS
LAD[0:31]
LSDWE
LSDRAS
LSDCAS
LSDWE
LCLK
LCS n
LALE
LAD
LCLK
LCS n
LALE
ZZZZZZ RAS ADD
MPC8544E PowerQUICC III Integrated Host Processor Family Reference Manual, Rev. 1
Refresh Recovery Interval (RFRC)
External Address and Command Buffers (BUFCMD)
Setup Cycle
ZZZZZZZZ
Command
XXXXXXXX
Figure 14-41. BUFCMD = 1, LCRR[BUFCMDC] = 2
Command (If Needed)
1111
PRECHARGE ALL
Figure 14-40. RFRC = 4 (6 Clock Cycles)
CAS ADD
PRETOACT = 3
XXXX
Setup Cycle
Command
AUTO REFRESH
D0
Command
1111
1111
D1
0000
D2
RFRC = 4 (6 Clocks)
D3
RAS ADD
XXXX
Freescale Semiconductor
ZZZZZZZZ
1111
ACTIVATE
Command
CAS ADD
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