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GX1 Datasheet(PDF) 122 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # GX1
Description  Processor Series Low Power Integrated x86 Solution
PDF  247 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

GX1 Datasheet(HTML) 122 Page - National Semiconductor (TI)

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122
Revision 1.0
Integrated Functions (Continued)
SDRAM Refresh Cycle
Figure 4-7 shows a SDRAM auto refresh cycle. The mem-
ory controller always precedes the refresh cycle with a
PRE command to all banks.
Page Miss
Figure 4-8 shows a READ/WRT command after a page
miss cycle. In order to program the new row address, a
PRE command must be issued followed by an ACT com-
mand.
Figure 4-7. Auto Refresh Cycle
Figure 4-8. READ/WRT Command to a New Row Address
SDCLK
CS#
RAS#
CAS#
WE#
MA[10]
SDCLK
COMMAND
ADDRESS
tRP
tRCD
PRE
NOP
NOP
ACT
NOP
NOP
R/W
NOP
ROW
COL
BA



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