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ADDR22 データシート(PDF) 45 Page - List of Unclassifed Manufacturers

部品番号 ADDR22
部品情報  Figure 1 shows the NS7520 modules. Dashed lines indicate shared pins
PDF  68 Pages
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メーカー  ETC2 [List of Unclassifed Manufacturers]
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ADDR22 データシート(HTML) 45 Page - List of Unclassifed Manufacturers

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SDRAM tim i ng
ww w.d i gi .c om
41
SDRAM read
SDRAM read, CAS latency = 2
Notes:
1
Port size determines which byte enable signals are active:
–
8-bit port = BE3*
–
16-bit port = BE[3:2]
–
32-bit port = BE[3:0]
2
The precharge and/or active commands are not always present. These commands depend on
the address of the previous SDRAM access.
3
If CAS latency = 3, 2 NOPs occur between the read and burst terminate commands.
4
If CAS latency = 3, 3 inhibits occur after burst terminate.
5
The TA* and TEA*/LAST signals are for reference only.
T1
T2
T1
prechg
active
read
nop
bterm
inhibit
inhibit
12
34
34
34
34
34
34
34
34
34
34
34
27
27
36
36
35
35
6
37
37
31
31
30
30
11
10
A10
BCLK
TA* (Note-5)
TEA*/LAST* (Note-5)
PortA2/AMUX
Non-muxed address
Muxed address
BE[3:0]* (DQM)
read D[31:0]
CS[4:0]*
CAS3* (RAS)
CAS2* (CAS)
CAS1* (WE)
CAS0* (A10/AP)
RW*



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