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參數(shù)資料
| 型號： | MX29LV640TXBI-90 |
| 廠商： | MACRONIX INTERNATIONAL CO LTD |
| 元件分類： | DRAM |
| 英文描述： | 64M-BIT [8M x 8/4M x 16] SINGLE VOLTAGE 3V ONLY FLASH MEMORY |
| 中文描述： | 4M X 16 FLASH 3V PROM, 90 ns, PBGA63 |
| 封裝： | 11 X 12 MM, 1.20 MM HEIGHT, 0.80 MM PITCH, PLASTIC, MO-210, CSP-63 |
| 文件頁數(shù)： | 19/70頁 |
| 文件大?。?/td> | 1188K |
| 代理商： | MX29LV640TXBI-90 |
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19
P/N:PM0920
REV. 1.2, NOV. 05, 2003
MX29LV640T/B
SECURED SILICON SECTOR
The MX29LV640T/B features a OTP memory region
where the system may access through a command se-
quence to create a permanent part identification as so
called Electronic Serial Number (ESN) in the device.
Once this region is programmed, any further modifica-
tion on the region is impossible. The secured silicon sector
is a 128 words in length, and uses a Secured Silicon
Sector Indicator Bit (Q7) to indicate whether or not the
Secured Silicon Sector is locked when shipped from the
factory. This bit is permanently set at the factory and
cannot be changed, which prevent duplication of a fac-
tory locked part. This ensures the security of the ESN
once the product is shipped to the field.
The MX29LV640T/B offers the device with Secured Sili-
con Sector either factory locked or customer lockable.
The factory-locked version is always protected when
shipped from the factory , and has the Secured Silicon
Sector Indicator Bit permanently set to a "1". The cus-
tomer-lockable version is shipped with the Secured Sili-
con Sector unprotected, allowing customers to utilize
that sector in any form they prefer. The customer-lock-
able version has the secured sector Indicator Bit perma-
nently set to a "0". Therefore, the Secured Silicon Sec-
tor Indicator Bit prevents customer, lockable device from
being used to replace devices that are factory locked.
The system access the Secured Silicon Sector through
a command sequence (refer to "Enter Secured Silicon/
Exit Secured Silicon Sector command Sequence). After
the system has written the Enter Secured Silicon Sector
command sequence, it may read the Secured Silicon
Sector by using the address normally occupied by the
last sector SA134 (for MX29LV640T) or first sector SA0
(for MX29LV640B). Once entry the Secured Silicon Sec-
tor the operation of boot sectors is disabled but the op-
eration of main sectors is as normally. This mode of op-
eration continues until the system issues the Exit Se-
cured Silicon Sector command sequence, or until power
is removed from the device. On power-up, or following a
hardware reset, the device reverts to sending command
to sector SA0.
LOW VCC WRITE INHIBIT
When VCC is less than VLKO the device does not ac-
cept any write cycles. This protects data during VCC
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 VCC
is greater than VLKO. The system must provide the proper
signals to the control pins to prevent unintentional write
when VCC is greater than VLKO.
WRITE PULSE "GLITCH" PROTECTION
Noise pulses of less than 5ns (typical) on CE or WE will
not initiate a write cycle.
LOGICAL INHIBIT
Writing is inhibited by holding any one of OE = VIL, CE =
VIH or WE = VIH. To initiate a write cycle CE and WE
must be a logical zero while OE is a logical one.
POWER-UP SEQUENCE
The MX29LV640T/B powers up in the Read only mode.
In addition, the memory contents may only be altered
after successful completion of the predefined command
sequences.
POWER-UP WRITE INHIBIT
If WE=CE=VIL and OE=VIH 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.
POWER SUPPLY DE COUPLING
In order to reduce power switching effect, each device
should have a 0.1uF ceramic capacitor connected be-
tween its VCC and GND.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MX29LV640TXCC-12 | 64M-BIT [8M x 8/4M x 16] SINGLE VOLTAGE 3V ONLY FLASH MEMORY |
| MX29LV640TXCC-90 | 64M-BIT [8M x 8/4M x 16] SINGLE VOLTAGE 3V ONLY FLASH MEMORY |
| MX29LV640TXCI-12 | 64M-BIT [8M x 8/4M x 16] SINGLE VOLTAGE 3V ONLY FLASH MEMORY |
| MX29LV640TXCI-90 | 64M-BIT [8M x 8/4M x 16] SINGLE VOLTAGE 3V ONLY FLASH MEMORY |
| MX29LV640TXEC-12 | 64M-BIT [8M x 8/4M x 16] SINGLE VOLTAGE 3V ONLY FLASH MEMORY |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MX29LV800CBMC-70G | 制造商:Macronix International Co Ltd 功能描述:IC FLASH 8MBIT 70NS 44SOP 制造商:Macronix International Co Ltd 功能描述:MX29LV Series 3 V 8 Mb (1 M x 8 / 512 K x 16) 70 ns Parallel Flash - SOP-44 |
| MX29LV800CBMC-90G | 制造商:Macronix International Co Ltd 功能描述:IC FLASH 8MBIT 90NS 44SOP |
| MX29LV800CBMI-70G | 制造商:Macronix International Co Ltd 功能描述:IC FLASH 8MBIT 70NS 44SOP |
| MX29LV800CBTC-70G | 制造商:Macronix International Co Ltd 功能描述:IC FLASH 8MBIT 70NS 48TSOP 制造商:Macronix International Co Ltd 功能描述:MX29LV Series 3 V 8 Mb (1M x 8/512k x 16) 90 ns Parallel Flash - TSOP-48 |
| MX29LV800CBTC-90G | 制造商:Macronix International Co Ltd 功能描述:IC FLASH 8MBIT 90NS 48TSOP 制造商:Macronix International Co Ltd 功能描述:MX29LV Series 3 V 8 Mb (1M x 8/512k x 16) 90 ns Parallel Flash - TSOP-48 |
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