Filter
Top Products
TNETX4090
ThunderSWITCH II
9-PORT 100-/1000-MBIT/S ETHERNET
SWITCH
SPWS044E – DECEMBER 1997 – REVISED AUGUST 1999
68
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
RDRAM interface
RDRAM (see Figure 24)
NO. MIN MAX UNIT
1 t
c(DX_CLK)
Cycle time DTX_CLK, DRX_CLK 3.33 3.33 ns
2, 3 t
w(DX_CLK)
Pulse duration, DTX_CLK, DRX_CLK low or high 45% 55% t
c(DX_CLK)
4, 5 t
w(TICK)
Pulse duration, tick time 0.5 0.5 t
cycle
6, 8 t
su(DBUS_DATA)
Setup time, DBUS_DATA before tick 0.35 ns
7, 9 t
h(DBUS_DATA)
Hold time, DBUS_DATA after tick 0.35 ns
10, 11 t
d(DBUS_OUT)
Delay time, DBUS_DATA, DBUS_CTRL, DBUS_EN from tick 0.635 1.438 t
c(DX_CLK)
t
cycle
†
Cycle time, internal clock 4 t
c(DX_CLK)
†
Not shown in Figure 24 due to scale
DBUS_DATA (in)
DTX_CLK
DRX_CLK
DBUS_CTRL
DBUS_EN
DBUS_DATA (out)
6 7 8 9
10 11
4 5
2 3
1
Figure 24. RDRAM