CAT28F001 CATALYST [Catalyst Semiconductor], CAT28F001 Datasheet - Page 14

• Manufacturer Part Number: CAT28F001
• Description: 1 Megabit CMOS Boot Block Flash Memory
• Manufacturer: CATALYST [Catalyst Semiconductor]

CAT28F001
Figure 7. A.C. Timing for Program/Erase Operation
POWER UP/DOWN PROTECTION
The CAT28F001 offers protection against inadvertent
programming during V
When powering up the device there is no power-on
sequencing necessary. In other words, V
may power up in any order. Additionally V
hardwired to V
any power up/down cycling. The internal command
register of the CAT28F001 is reset to the Read Mode on
power up.
Doc. No. 25071-00 2/98 F-1
ADDRESSES (A)
DATA (I/O)
V PP (V)
WE (W)
OE (G)
CE (E)
RP (P)
V PPH
V PPL
V HH
6.5V
V IH
V IH
V IH
V IH
V IH
V IH
V IH
V IL
V IL
V IL
V IL
V IL
V IL
V IL
V CC POWER-UP
PPH
& STANDBY
HIGH Z
independent of the state of V
t ELWL
t PHWL
PP
ERASE SETUP COMMAND
t DVWH
WRITE PROGRAM OR
and V
t AVAV
A IN
D IN
CC
t WLWH
power transitions.
t WHWL
t WHDX
t WHEH
VALID ADDRESS & DATA (PROGRAM)
OR ERASE CONFIRM COMMAND
PP
t AVWH
PP
and V
may be
WRITE
CC
A IN
D IN
and
t VPWH
t PHHWH
CC
14
t WHAX
POWER SUPPLY DECOUPLING
To reduce the effect of transient power supply voltage
spikes, it is good practice to use a 0.1 F ceramic
capacitor between V
high-frequency capacitors should be placed as close as
possible to the device for optimum decoupling.
AUTOMATED PROGRAM
OR ERASE DELAY
t WHQV 1, 2, 3, 4
t WHGL
REGISTER DATA
READ STATUS
CC
and V
VALID
SRD
t QVPH
t QVVL
SS
and V
WRITE READ ARRAY
COMMAND
PP
and V
D IN
SS
. These
28F001 F09