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参数资料
| 型号： | SST38VF6401-90-4C-EKE |
| 厂商： | SILICON STORAGE TECHNOLOGY INC |
| 元件分类： | PROM |
| 英文描述： | 4M X 16 FLASH 2.7V PROM, 90 ns, PDSO48 |
| 封装： | 12 X 20 MM, ROHS COMPLIANT, MO-142DD, TSOP1-48 |
| 文件页数： | 55/55页 |
| 文件大小： | 1547K |
| 代理商： | SST38VF6401-90-4C-EKE |
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Preliminary Specification
64 Mbit (x16) Advanced Multi-Purpose Flash Plus
SST38VF6401 / SST38VF6402 / SST38VF6403 / SST38VF6404
9
2008 Silicon Storage Technology, Inc.
S71309-03-000
08/08
should be used to set the NVPBs of any blocks that are to
be protected before exiting the Non-Volatile Block Protec-
Upon a power cycle or hardware reset, the NVPBs retain
their states. Memory areas that are protected using Non-
Volatile Block Protection remain protected. The NVPB Pro-
gram and NVPBs Erase commands are permanently dis-
abled once the Irreversible Block Lock command is issued.
See “Irreversible Block Locking” on page 10 for further
information.
Advanced Protection
The SST38VF6401/6402/6403/6404 provide Advanced
Protection features that allow users to implement condi-
tional access to the NVPBs. Specifically, Advanced Protec-
tion uses the Global Lock Bit to protect the NVPBs. If the
Global Lock bit is ‘0’ then all the NVPBs states are frozen
and cannot be modified in any mode. If the Global Lock bit
is ‘1’, then all the NVPBs can be modified in Non-Volatile
Block Protection mode. After using the Global Lock of
NVPBs Entry command to enter the Global Lock of NVPBs
mode, the Global Lock Bit can be activated by issuing a Set
Global Lock Bit command, which sets the Global Lock Bit to
‘0’. The Global Lock bit cannot be set to ‘1’ with this com-
mand. The status of the bit can be read with the Global
Lock Bit Status command. Use the Global Lock of NVPBs
Exit command to exit Global Lock of NVPBs mode. See
The steps used to change the Global Lock Bit from '0' to'1,'
to allow access to the NVPBs, depend on whether the
device has been set to use Pass-Through or Password
mode. When using Advanced Protection, select either
Pass-Through only mode or Password only mode by pro-
gramming the DQ2 and DQ1 bits in the PSR. Although the
factory default is Pass-Through mode (DQ2 = 1, DQ1 = 1),
the user should explicitly chose either Pass-Through only
mode (DQ2 = 1, DQ1 = 0), or Password only mode (DQ2 =
0, DQ1 = 1). Keeping the SST38VF6401/6402/6403/6404
in the factory default Pass-Through mode leaves the device
open to unauthorized changes of DQ2 and DQ1 in the
for more information about the PSR.
Pass-Through Mode (DQ2, DQ1 = 1,0)
The Pass-Through Mode allows the Global Lock Bit state
to be cleared to ‘1’ by a power-down power-up sequence or
a hardware reset (RST# pin = 0). No password is required
in Pass-Through mode.
To set the Global Lock Bit to ‘0’, use the Set Global Lock Bit
command while in the Global Lock of NVPBs mode. Select
the Pass-Through only mode by programming PSR bit
DQ2 = 1 and DQ1 = 0.
Password Mode (DQ2, DQ1 = 0,1)
In the Password Mode, the Global Lock Bit is set to ‘0’ by
the Set Global Lock Bit command, a power-down power-up
sequence, or a hardware reset (RST# pin = 0). Select the
Password only mode by programming PSR bit DQ2 = 0
and DQ1 = 1. Note that when the PSR Program command
is issued in Password mode, the Global Lock bit is auto-
matically set to ‘0’.
In contrast to the Pass-Through Mode, in the Password
mode, the only way to clear the Global Lock Bit to ‘1’ is to
submit the correct 64-bit password using the Submit Pass-
word command in Password Commands Mode. The words
of the password can be submitted in any order as long as
each 16 bit section of the password is matched with its cor-
rect address. After the entire 64 bit password is submitted,
the device takes approximately 2 s to verify the password.
A subsequent Submit Password command cannot be
issued until this verification time has elapsed.
The 64-bit password must be chosen by the user before
programming the DQ2 and DQ1 OTP bits of the PSR to
choose Password Mode. The default 64 bit password on
the device from the factory is FFFFFFFFFFFFFFFFh.
Enter the Password Commands mode by issuing the Pass-
word Commands Entry command. Then, use the Pass-
word Program command to program the desired password.
Use caution when programming the password because
there
is
no
method
to
reset
the
password
to
FFFFFFFFFFFFFFFFh. Once a password bit has been set
to ‘0’, it cannot be changed back to ‘1’. See Table 11 for fur-
ther details about Password-related commands.
The password can be read using the Password Read com-
mand to verify the desired password has been pro-
grammed. SST recommends testing the password before
permanently choosing Password Mode.
To test the password, do the following:
1. Enter the Global Lock of NVPBs mode.
2. Set the Global Lock Bit to ‘0’, and verify the value.
3. Exit the Global Lock of NVPBs mode.
4. Enter the Password Commands mode.
5. Submit the 64-bit password with the Submit Pass-
word command.
6. Wait 2 s for the device to verify the password.
7. Exit the Password Commands mode.
8. Re-enter the Global Lock of NVPBs mode
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SST38VF6401-90-5C-B3KE | 功能描述:闪存 64M (4Mx16) 90ns 2.7-3.6V Commercial RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| SST38VF6401-90-5C-EKE | 功能描述:闪存 64M (4Mx16) 90ns 2.7-3.6V Commercial RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| SST38VF6401-90-5C-EKE-T | 功能描述:闪存 2.7 to 3.6V 64Mbit Parallel Adv MPF+ RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| SST38VF6401-90-5I-B3KE | 功能描述:闪存 2.7 to 3.6V 64Mbit Parallel Adv MPF+ RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel |
| SST38VF6401-90-5I-B3KE-T | 制造商:Microchip Technology 功能描述:Flash Parallel 3.3V 64Mbit 4M x 16bit 90ns 48-Pin TFBGA T/R 制造商:Microchip Technology Inc 功能描述:2.7V TO 3.6V 64MBIT PM PARALLEL ADVANCED MPF+ - Tape and Reel 制造商:Microchip Technology Inc 功能描述:IC FLASH 64MBIT 90NS 48TFBGA 制造商:Microchip Technology Inc 功能描述:2.7Vto3.6V 64Mb ParAdvanced MPF+ |
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