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AT75C310 数据表(PDF) 6 Page - ATMEL Corporation

部件名 AT75C310
功能描述  Smart Internet Appliance Processor Electrical and Mechanical Characteristics
PDF  17 Pages
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制造商  ATMEL [ATMEL Corporation]
网页  http://www.atmel.com
标志 ATMEL - ATMEL Corporation

AT75C310 数据表(HTML) 6 Page - ATMEL Corporation

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AT75C310
6
Figure 5. DRAM Refresh Cycle
Table 4. DRAM Refresh Cycle Timings
Symbol
Parameter
Min (ns)
Max (ns)
t
RC
Cycle Time
125.0
–
t
RAS
RAS Pulse Width
82.0
–
tRP
RAS Precharge Time
42.0
–
t
CP
CAS Precharge Time
19.0
–
t
RPC
RAS Precharge before CAS
33.0
–
tCSR
CAS Setup before RAS
48.0
–
t
CHR
CAS Hold after RAS
32.0
–
t
CRP
CAS to RAS Precharge Time
49.0
–
tWRP
Write Enable Setup Time (Refresh Cycle)
91.0
–
t
WRH
Write Enable Hold Time (Refresh Cycle)
32.0
–
tRC
tRP
tRAS
tRPC
tCSR
tCRP
NDWE
NCASx
NRASx
tRP
tCP
tCHR
tWRH
tWRP



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