ATA25 White Electronic Designs Corporation, ATA25 Datasheet - Page 56

• Manufacturer Part Number: ATA25
• Description: Density = 32MB-1GB ;; Memory Device = Hitachi Flash ;; Organization = X16/x8 ;; Speed (ns) = 250 ;; Volt = 3/5
• Manufacturer: White Electronic Designs Corporation

June 2000 Rev. 1 – ECO #12936
Power on Reset Characteristics
All card status are reset automatically when V
Parameter
-CE setup time
VCC rising up time
Power on Reset Timing
Attention for Card Use
7PxxxATA25xxC25
In the reset or power off, all register information is cleared.
All card status are cleared automatically when Vcc voltage turns below about 2.5V.
Notice that the card insertion/removal should not be executed durning host is active, if the card is used
in true IDE mode.
After the card hard reset, soft reset, or power on reset, the card cannot access during +READY pin is
"low" level.
Please notice that the card insertion/removal should be executed after card internal operations are
completed (status register bit 7 turns from "1" to "0").
Before the card insertion Vcc cannot be supplied to the card. After confirmation that –CD1, -CD2 pins
are inserted, supply Vcc to the card.
– OE must be kept at the Vcc level during power on reset in memory card mode and I/O card mode.
– OE must be kept constantly at the GND level in True IDE mode.
Unused pins of data bus (D0 to D15) signals should not be opened.
-CE1, -CE2
Symbol
tsu(VCC)
tpr
Vcc
CC
voltage goes over about 2.3 V.
t
pr
100
Min
0.1
56
t
su(Vcc)
Typ
—
—
White Electronic Designs Corporation [phone]
Max
—
100
Unit
ms
ms
Test conditions