eorex
EM42AM3284LBA
AC Operating Test Characteristics (Continued)
(VDD=1.8V±0.1V, TA=0°C ~70°C)
-75
Units
Symbol
Parameter
Read Postamble
Min.
0.4
Max.
0.6
tRPST
tRAS
tCK
ns
Active to Precharge command period
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
75
108
30
ns
ns
ns
ns
22.5
tRRD
tCCD
Active bank A to B command period
15
ns
Column address to column address
delay
1
tCK
tHZP
tCDLW
tDPL
Pre-charge command to high-Z
Last data in to Write command
Last data in to Precharge command
3
1
3
tCK
tCK
tCK
tSREX
tWTR
Exit self refresh to non-col. command
Internal Write to Read command delay
16
1
tCK
tCK
tCKE
tWPD
tRPD
CKE minimum pulse width
2
tCK
tCK
tCK
tCK
tCK
tCK
us
Write to pre-charge delay(same bank) 3+BL/2
Read to pre-charge delay(same bank)
Write to Read command delay
Burst stop to write delay
BL/2
tWRD
tBSTW
tWRD
tREFI
2+BL/2
3
2
Write recovery
Average periodic refresh interval
7.8
Jul. 2006
www.eorex.com
8/20
EOREX [ EOREX CORPORATION ]
