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8 Mbit Firmware Hub
A Microchip Technology Company
SST49LF008A
Data Sheet
Write Lock
The Write-Lock bit, bit 0, controls the lock state described in Table 7. The default Write status of all
blocks after power-up is write locked. When bit 0 of the Block Locking register is set, Program and
Erase operations for the corresponding block are prevented. Clearing the Write-Lock bit will unprotect
the block. The Write-Lock bit must be cleared prior to starting a Program or Erase operation since it is
sampled at the beginning of the operation.
The Write-Lock bit functions in conjunction with the hardware Write Lock pin TBL# for the top Boot
Block. When TBL# is low, it overrides the software locking scheme. The top Boot Block Locking regis-
ter does not indicate the state of the TBL# pin.
The Write-Lock bit functions in conjunction with the hardware WP# pin for blocks 0 to 6. When WP# is
low, it overrides the software locking scheme. The Block Locking register does not indicate the state of
the WP# pin.
Lock Down
The Lock-Down bit, bit 1, controls the Block Locking register as described in Table 7. When in the FWH
interface mode, the default Lock Down status of all blocks upon power-up is not locked down. Once the
Lock-Down bit is set, any future attempted changes to that Block Locking register will be ignored. The
Lock-Down bit is only cleared upon a device reset with RST# or INIT# or power down. Current Lock
Down status of a particular block can be determined by reading the corresponding Lock-Down bit.
Once a block’s Lock-Down bit is set, the Write-Lock bits for that block can no longer be modified, and
the block is locked down in its current state of write accessibility.
JEDEC ID Registers
The JEDEC ID registers for the boot device appear at FFBC0000H and FFBC0001H in the 4 GByte
system memory map, and will appear elsewhere if the device is not the boot device. Register is not
available for read when the device is in Erase/Program operation. Unused register location will read as
00H. Refer to the relevant application note for details. See Table 2 for the device ID code.
?2011 Silicon Storage Technology, Inc.
16
DS25085A
10/11
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相关代理商/技术参数
SST49LF008A-33-4C-NH 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:2 Mbit / 3 Mbit / 4 Mbit / 8 Mbit Firmware Hub
SST49LF008A-33-4C-NHE 功能描述:闪存 8M (1Mx8) 33MHz Commercial Temp 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
SST49LF008A-33-4C-NHE_ 制造商:Microchip Technology Inc 功能描述:
SST49LF008A-33-4C-NHE-T 功能描述:闪存 8M (1Mx8) 33MHz 3.0-3.6V 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
SST49LF008A-33-4C-NHE-T-CUT TAPE 制造商:Microchip 功能描述:SST49LF Series 8 Mbit 1024 K x 8 3.3 V Firmware Hub - PLCC-32
SST49LF008A-33-4C-WH 制造商:SST 制造商全称:Silicon Storage Technology, Inc 功能描述:2 Mbit / 3 Mbit / 4 Mbit / 8 Mbit Firmware Hub
SST49LF008A-33-4C-WHE 功能描述:闪存 8 MBIT FIRMWARE HUB 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
SST49LF008A-33-4C-WHE_ 制造商:Microchip Technology Inc 功能描述: