at75c220 ATMEL Corporation, at75c220 Datasheet - Page 25
at75c220
Manufacturer Part Number
at75c220
Description
Smart Internet Appliance Processor Siap
Manufacturer
ATMEL Corporation
Datasheet
1.AT75C220.pdf
(144 pages)
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Figure 8. Read with Burst Length of 4 and CAS Latency of 2
Figure 9. Read with Burst Length of 2 and CAS Latency of 2
SDRAM CMD
SDRAM CMD
sdmc_data
sdmc_data
BTRAN
BWAIT
BTRAN
BWAIT
BCLK
BCLK
addr
Addr
BD
BA
BD
BA
NOP
NOP
NSEQ
NSEQ
BANK
BANK
PRE
PRE
A0
A0
NOP
NOP
ACT
ROW
ACT
ROW
NOP
NOP
SEQ
A1
SEQ
A1
READ
COL0
READ
COL0
READ
COL1
READ
COL1
D0
READ
COL2
READ
COL2
D0
D0
D0
D1
READ
COL3
SEQ
A2
READ
D1
COL3
SEQ
A2
D1
D1
D2
SEQ
NOP
A3
D2
SEQ
NOP
A3
x
D2
D3
NOP
NSEQ
D3
NOP
x
D3
PRE
BANK
NOP
25
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