參數(shù)資料
型號(hào): AM29F016D-90SC
廠(chǎng)商: ADVANCED MICRO DEVICES INC
元件分類(lèi): PROM
英文描述: 16 Megabit (2 M x 8-Bit) CMOS 5.0 Volt-only, Uniform Sector Flash Memory
中文描述: 2M X 8 FLASH 5V PROM, 90 ns, PDSO44
封裝: MO-180AA, SOP-44
文件頁(yè)數(shù): 14/45頁(yè)
文件大?。?/td> 1145K
代理商: AM29F016D-90SC
Am29F016D
13
Once V
ID
is removed from the RESET# pin, all the
previously protected sector groups are
protected again. Figure 1 shows the algorithm, and
the Temporary Sector Group Unprotect diagram (Fig-
ure 16) shows the timing waveforms, for this feature.
Hardware Data Protection
The command sequence requirement of unlock cycles
for programming or erasing provides data protection
against inadvertent writes (refer to the Command Defi-
nitions table). In addition, the following hardware data
protection measures prevent accidental erasure or pro-
gramming, which might otherwise be caused by spuri-
ous system level signals during V
CC
power-up and
power-down transitions, or from system noise.
Low V
CC
Write Inhibit
When V
CC
is less than V
LKO
, the device does not ac-
cept any write cycles. This protects data during V
CC
power-up and power-down. The command register and
all internal program/erase circuits are disabled, and the
device resets. Subsequent writes are ignored until V
CC
is greater than V
LKO
. The system must provide the
proper signals to the control pins to prevent uninten-
tional writes when V
CC
is greater than V
LKO
.
Write Pulse “Glitch” Protection
Noise pulses of less than 5 ns (typical) on OE#, CE# or
WE# do not initiate a write cycle.
Logical Inhibit
Write cycles are inhibited by holding any one of OE#
= V
IL
, CE# = V
IH
or WE# = V
IH
. To initiate a write cy-
cle, CE# and WE# must be a logical zero while OE#
is a logical one.
Power-Up Write Inhibit
If WE# = CE# = V
IL
and OE# = V
IH
during power up, the
device does not accept commands on the rising edge
of WE#. The internal state machine is automatically
reset to reading array data on power-up.
START
Perform Erase or
Program Operations
RESET# = V
IH
Temporary
Sector Group Unprotect
Completed (Note 2)
RESET# = V
ID
(Note 1)
Notes:
1. All protected sector groups unprotected.
2. All previously protected sector groups are protected
once again.
Figure 1.
Temporary Sector Group Unprotect
Operation
相關(guān)PDF資料
PDF描述
Am29F016D-90SCB 16 Megabit (2 M x 8-Bit)CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F016D-90SE 16Megabit(2M*8-bit)的CMOS 5.0 volt-only,uniform sector flash memory
Am29F016D-90SEB 16 Megabit (2 M x 8-Bit)CMOS 5.0 Volt-only, Uniform Sector Flash Memory
AM29F016D-90SI 16 Megabit(2M*8-bit)CMOS 5.0 volt-only,uniform sector flash memory
Am29F016D-90SIB 16 Megabit (2 M x 8-Bit)CMOS 5.0 Volt-only, Uniform Sector Flash Memory
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