at75c310 ATMEL Corporation, at75c310 Datasheet - Page 6

• Manufacturer Part Number: at75c310
• Description: Smart Internet Appliance Processor Electrical And Mechanical Characteristics
• Manufacturer: ATMEL Corporation

Figure 5. DRAM Refresh Cycle
Table 4. DRAM Refresh Cycle Timings
6
Symbol
t
t
t
t
t
t
t
t
t
t
RC
RAS
RP
CP
RPC
CSR
CHR
CRP
WRP
WRH
Parameter
Cycle Time
RAS Pulse Width
RAS Precharge Time
CAS Precharge Time
RAS Precharge before CAS
CAS Setup before RAS
CAS Hold after RAS
CAS to RAS Precharge Time
Write Enable Setup Time (Refresh Cycle)
Write Enable Hold Time (Refresh Cycle)
NRASx
NCASx
NDWE
AT75C310
t
RPC
t
CP
t
WRP
t
RP
t
CSR
t
CHR
t
RAS
t
WRH
Min (ns)
125.0
82.0
42.0
19.0
33.0
48.0
32.0
49.0
91.0
32.0
t
RC
t
CRP
t
RP
Max (ns)
–
–
–
–
–
–
–
–
–
–