eorex
EM42AM3284LBC
AC Operating Test Characteristics (Continued)
(VDD=1.8V±0.1V, TA=0°C ~70°C)
-6
-75
Symbol
Parameter
Read Postamble
Units
Min.
0.4
Max.
0.6
Min.
0.4
Max.
0.6
tRPST
tRAS
tCK
ns
Active to Precharge command period
42
120k
45
120k
tRC
tRFC
tRCD
tRP
Active to Active command period
Auto Refresh Row Cycle Time
Active to Read or Write delay
Precharge command period
72
90
24
18
75
108
30
ns
ns
ns
ns
22.5
tRRD
tCCD
Active bank A to B command period
12
1
15
ns
Column address to column address
delay
1
tCK
tCDLW
tDPL
Last data in to Write command
Last data in to Precharge command
Burst stop to write delay
1
3
3
1
3
3
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
tCK
us
tBSTW
tWPD
tRPD
Write to pre-charge delay(same bank) 3+BL/2
3+BL/2
Read to pre-charge delay(same bank)
Exit self refresh to non-col. command
Internal Write to Read command delay
Write recovery
BL/2
20
1
BL/2
16
1
tSREX
tWTR
tWRD
tCKE
2
2
CKE minimum pulse width
2
2
tREFI
Average periodic refresh interval
7.8
7.8
Jun. 2009
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