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Interface Description SanDisk CompactFlash Card OEM Product Manual
3.3.3 Power Up/Power Down Timing The timing specification in Table 3-9 was defined to permit peripheral cards to perform power-up initialization. Table 3-9 Power Up/Power Down Timing
Item Value
Symbol Condition
Vi (CE) 0V <VCC <2.0V 0 ViMAX
CE Signal Levela
2.0V <VCC <VIH <VCC - 0.1 ViMAX
<VIH <VCC VIH ViMAX
CE Setup Time 20 ms TSU (VCC)
CE Setup Time TSU (RESET) 20 ms
CE Recover Time 0.001 ms
TREC (VCC)
10%-->90% of (VCC + 5%) 0.1 300 ms
tpr
VCC Rising Timeb
90% of (VCC + 5%)-->10% 3.0 300 ms tpf
VCC Falling Timeb
Reset Width TW (RESET) 10 µs
Th (Hi-z Reset) 1 ms
TS (Hi-z Reset) 0 ms
Min. Max. Unit
a. ViMAX means Absolute Maximum Voltage for Input in the period of 0V <VCC <2.0V, Vi (CE) is only
0V~ViMAX.
b. The tpr and tpf are defined as "linear waveform" in the period of 10% to 90% or vice-versa. Even if
the waveform is not "linear waveform," its rising and falling time must be met by this specification.
Figure 3-1 Power Up/Power Down Timing for Systems supporting RESET
VCC
2V
VIH
VCC Min.
t
rec
-CE1, -CE2
ts (Hi-z Reset)
Hi-z
tpf
tW(Reset)
VCC Min.
tW(Reset)
Reset
tpr tSU(VCC)
-CE1, -CE2
tSU(Reset) tSU(Reset)
th (Hi-z Reset)
Hi-z
2V
VIH
02/07, Rev. 12.0 3-10 © 2007 SanDisk Corporation
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