參數(shù)資料
型號： AM29BDS320GBD4VMI
廠商： SPANSION LLC
元件分類： DRAM
英文描述： 32 Megabit (2 M x 16-Bit), 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
中文描述： 2M X 16 FLASH 1.8V PROM, 70 ns, PBGA64
封裝： 8 X 9 MM, 0.80 MM PITCH, FBGA-64
文件頁數(shù)： 20/74頁
文件大?。?/td> 701K
代理商： AM29BDS320GBD4VMI
18
Am29BDS320G
27243B1 October 1, 2003
P r e l i m i n a r y
tem must provide the proper signals to the control inputs to prevent unintentional
writes when V
CC
is greater than V
LKO
.
W rite Pulse “ Glitch” Protection
Noise pulses of less than 5 ns (typical) on OE#, CE# or WE# do not initiate a write
cycle.
Logical I nhibit
Write cycles are inhibited by holding any one of OE# = V
IL
, CE# = V
IH
or WE# =
V
IH
. To initiate a write cycle, CE# and WE# must be a logical zero while OE# is a
logical one.
Pow er-Up W rite I nhibit
If WE# = CE# = RESET# = 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 the read mode on power-up.
V
CC
and V
IO
Pow er-up And Pow er-dow n Sequencing
The device imposes no restrictions on V
CC
and V
IO
power-up or power-down se-
quencing. Asserting RESET# to V
IL
is required during the entire V
CC
and V
IO
power sequence until the respective supplies reach their operating voltages. Once
V
CC
and V
IO
attain their respective operating voltages, de-assertion of RESET#
to V
IH
is permitted.
Common Flash Memory Interface (CFI)
The Common Flash Interface (CFI) specification outlines device and host system
software interrogation handshake, which allows specific vendor-specified soft-
ware algorithms to be used for entire families of devices. Software support can
then be device-independent, JEDEC ID-independent, and forward- and back-
ward-compatible for the specified flash device families. Flash vendors can
standardize their existing interfaces for long-term compatibility.
This device enters the CFI Query mode when the system writes the CFI Query
command, 98h, to address 55h any time the device is ready to read array data.
The system can read CFI information at the addresses given in Tables 3-6. To ter-
minate reading CFI data, the system must write the reset command.
The system can also write the CFI query command when the device is in the au-
toselect mode. The device enters the CFI query mode, and the system can read
CFI data at the addresses given in Tables 3-6. The system must write the reset
command to return the device to the reading array data.
For further information, please refer to the CFI Specification and CFI Publication
100, available via the web at the following URL:
http://www.amd.com/flash/cfi
.
Alternatively, contact a sales office or representative for copies of these
documents.
相關(guān)PDF資料
PDF描述
AM29BDS320GBD8VMI 32 Megabit (2 M x 16-Bit), 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
AM29BDS320GBD9VMI 32 Megabit (2 M x 16-Bit), 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
AM29BDS320GTC4VMI 32 Megabit (2 M x 16-Bit), 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
AM29BDS320GTC8VMI 32 Megabit (2 M x 16-Bit), 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
AM29BDS320GTC9VMI 32 Megabit (2 M x 16-Bit), 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
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