CAT28F512 CATALYST [Catalyst Semiconductor], CAT28F512 Datasheet - Page 13

• Manufacturer Part Number: CAT28F512
• Description: 512K-Bit CMOS Flash Memory
• Manufacturer: CATALYST [Catalyst Semiconductor]

Preliminary
Abort/Reset
An Abort/Reset command is available to allow the user
to safely abort an erase or program sequence. Two
consecutive program cycles with FFH on the data bus
will abort an erase or a program operation. The abort/
reset operation can interrupt at any time in a program or
erase operation and the device is reset to the Read
Mode.
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.
Figure 8. Alternate A.C. Timing for Program Operation
ADDRESSES
DATA (I/O)
WE (E)
CE (W)
OE (G)
V CC POWER-UP
V CC
V PP
& STANDBY
5.0V
0V
V PPH
V PPL
t GHEL
HIGH-Z
CC
SETUP PROGRAM
and V
t DVEH
COMMAND
t EHWH
t VPEL
t WC
SS
t EHEL
t WLEL
DATA IN
= 40H
and V
t AVEL
LATCH ADDRESS
PP
and V
& DATA
t EHDX
t WLEL
SS
t ELAX
DATA IN
. These
t DVEH
PROGRAMMING
t ELEH
t EHWH
t WLEL
13
t EHDX
t EHEH
POWER UP/DOWN PROTECTION
The CAT28F512 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 CAT28F512 is reset to the Read Mode on
power up.
t ELEH
t DVEH
COMMAND
PROGRAM
VERIFY
t WC
DATA IN
= C0H
PPH
t EHWH
t EHGL
independent of the state of V
t EHDX
t OLZ
t OE
t LZ
t CE
PP
VERIFICATION
PROGRAM
and V
t RC
DATA OUT
CC
VALID
power transitions.
V CC POWER-DOWN/
Doc. No. 25042-00 2/98 F-1
CAT28F512
STANDBY
t EHQZ
t DF
t OH
PP
PP
and V
may be
CC
28F512 F10
and
CC