ADM5120
Electrical
Specification
5.3 AC Timing
5.3.1 SDRAM
interface
(
Unit: ns, Min: best case, Max: worst case
)
Signal Name
Description
Edge
Tck
clock cycle time
P
Tps
command/address setup delay time in precharge stage
P
Tph
command/address hold delay time in precharge stage
P
Tas
command/address setup delay time in active stage
P
Tah
command/address hold delay time in active stage
P
Tws
command/address setup delay time in write stage
P
Twh
command/address hold delay time in write stage
P
Trs
command/address setup delay time in read stage
P
Trh
command/address hold delay time in read stage
P
Note:
ADMtek Inc.
5-2
P means positive edge.
Figure 5-1 Precharge Command
Precharge Com m and
SCLK
SDC_CSZ[0]
SDC_RASZ
SDC_CASZ
SDC_W EZ
XA[14:0]
code
Tck
Tps
Tph