參數(shù)資料
型號(hào)： AM29BDS323DT11AWKI
廠商： ADVANCED MICRO DEVICES INC
元件分類： PROM
英文描述： 32 Megabit (2 M x 16-Bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
中文描述： 2M X 16 FLASH 1.8V PROM, 110 ns, PBGA47
封裝： 7 X 10 MM, 0.50 MM PITCH, FBGA-47
文件頁(yè)數(shù)： 16/44頁(yè)
文件大小： 746K
代理商： AM29BDS323DT11AWKI
16
Am29BDS323D
P R E L I M I N A R Y
the system was writing to the read mode. Once erasure
begins, however, the device ignores reset commands
until the operation is complete.
The reset command may be written between the
sequence cycles in a program command sequence
before programming begins. This resets the bank to
which the system was writing to the read mode. If the
program command sequence is written to a bank that
is in the Erase Suspend mode, writing the reset
command returns that bank to the erase-suspend-read
mode. Once programming begins, however, the device
ignores reset commands until the operation is com-
plete.
The reset command may be written between the
sequence cycles in an autoselect command sequence.
Once in the autoselect mode, the reset command must
be written to return to the read mode. If a bank entered
the autoselect mode while in the Erase Suspend mode,
writing the reset command returns that bank to the
erase-suspend-read mode.
If DQ5 goes high during a program or erase operation,
writing the reset command returns the banks to the
read mode (or erase-suspend-read mode if that bank
was in Erase Suspend).
Autoselect Command Sequence
The autoselect command sequence allows the host
system to access the manufacturer and device codes,
and determine whether or not a sector is protected.
Table 4 shows the address and data requirements. The
autoselect command sequence may be written to an
address within a bank that is either in the read or
erase-suspend-read mode. The autoselect command
may not be written while the device is actively program-
ming or erasing in the other bank.
The autoselect command sequence is initiated by first
writing two unlock cycles. This is followed by a third
write cycle that contains the bank address and the
autoselect command. The bank then enters the
autoselect mode. The system may read at any address
within the same bank any number of times without ini-
tiating another autoselect command sequence:
I
A read cycle at address (BA)XX00h (where BA is
the bank address) returns the manufacturer code.
I
A read cycle at address (BA)XX01h returns the
device code.
I
A read cycle to an address containing a sector ad-
dress (SA) within the same bank, and the address
0002h on A15
–
A0 returns 0001h if the sector is
locked, or 0000h if it is unlocked. (Refer to Table 2
for valid sector addresses).
The system must write the reset command to return to
the read mode (or erase-suspend-read mode if the
bank was previously in Erase Suspend).
Program Command Sequence
Programming is a four-bus-cycle operation. The
program command sequence is initiated by writing two
unlock write cycles, followed by the program set-up
command. The program address and data are written
next, which in turn initiate the Embedded Program
algorithm. The system is
not
required to provide further
controls or timings. The device automatically provides
internally generated program pulses and verifies the
programmed cell margin. Table 4 shows the address
and data requirements for the program command
sequence.
When the Embedded Program algorithm is complete,
that bank then returns to the read mode and addresses
are no longer latched. The system can determine the
status of the program operation by monitoring DQ7 or
DQ6/DQ2. Refer to the Write Operation Status section
for information on these status bits.
Any commands written to the device during the
Embedded Program Algorithm are ignored.
Note that a
hardware reset
immediately terminates the program
operation. The program command sequence should be
reinitiated once that bank has returned to the read
mode, to ensure data integrity.
Programming is allowed in any sequence and across
sector boundaries.
A bit cannot be programmed
from
“
0
”
back to a
“
1.
”
Attempting to do so may
cause that bank to set DQ5 = 1, or cause the DQ7 and
DQ6 status bit to indicate the operation was suc-
cessful. However, a succeeding read will show that the
data is still
“
0.
”
Only erase operations can convert a
“
0
”
to a
“
1.
”
Unlock Bypass Command Sequence
The unlock bypass feature allows the system to
program to a bank faster than using the standard
program command sequence. The unlock bypass
command sequence is initiated by first writing two
unlock cycles. This is followed by a third write cycle
containing the unlock bypass command, 20h. That
bank then enters the unlock bypass mode. A two-cycle
unlock bypass program command sequence is all that
is required to program in this mode. The first cycle in
this sequence contains the unlock bypass program
command, A0h; the second cycle contains the program
address and data. Additional data is programmed in
the same manner. This mode dispenses with the initial
two unlock cycles required in the standard program
command sequence, resulting in faster total program-
ming time. The host system may also initiate the chip
erase and sector erase sequences in the unlock
bypass mode. The erase command sequences are
four cycles in length instead of six cycles. Table 4
shows the requirements for the command sequence.
相關(guān)PDF資料
PDF描述
AM29BDS643D 64 Megabit (4 M x 16-Bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
AM29BDS643DT9AWLI 64 Megabit (4 M x 16-Bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
AM29BDS643DT9BWLI 64 Megabit (4 M x 16-Bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory
AM29C818A High Speed CMOS Logic Quad D-Type Flip-Flops with Reset 16-CDIP -55 to 125
AM29C818AJC CMOS PIPELINE REGISTER WITH SSR DIAGNOSTICS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM29BDS643GT5KVAI 制造商:Spansion 功能描述:FLASH PARALLEL 1.8V 64MBIT 4MX16 55NS 44FBGA - Trays
AM29BL802CB-65RZET 制造商:Spansion 功能描述:
AM29C01WW WAF 制造商:Advanced Micro Devices 功能描述:
AM29C10API 制造商:Rochester Electronics LLC 功能描述:- Bulk
AM29C10AWW DIE 制造商:Advanced Micro Devices 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*