参数资料
型号: SST38VF6404-90-5I-B3KE
厂商: Microchip Technology
文件页数: 18/64页
文件大小: 0K
描述: IC FLASH MPF 64MBIT 90NS 48TFBGA
特色产品: SST Serial and Parallel Flash Memory
标准包装: 480
系列: SST38
格式 - 存储器: 闪存
存储器类型: FLASH
存储容量: 64M(4M x 16)
速度: 90ns
接口: 并联
电源电压: 2.7 V ~ 3.6 V
工作温度: -40°C ~ 85°C
封装/外壳: 48-TFBGA
供应商设备封装: 48-TFBGA
包装: 托盘
64 Mbit (x16) Advanced Multi-Purpose Flash Plus
A Microchip Technology Company
SST38VF6401 / SST38VF6402 / SST38VF6403 / SST38VF6404
Data Sheet
Protection Settings Register (PSR)
The Protection Settings Register (PSR) is a user-programmable register that allows for further custom-
ization of the SST38VF6401/6402/6403/6404 protection features. The 16-bit PSR provides four One
Time Programmable (OTP) bits for users, each of which can be programmed individually. However,
once an OTP bit is programmed to ‘0’, the value cannot be changed back to a ‘1’. The other 12 bits of
the PSR are reserved. See Table 8 for the definition of all 16-bits of the PSR.
Table 8: PSR Bit Definitions
Bit
Default from Factory Definition
DQ 15 -DQ 5
DQ 4
DQ 3
DQ 2
DQ 1
DQ 0
FFFh
1
1
1
1
1
Reserved
VPB power-up / hardware reset state
0 = all protected
1 = all unprotected
Reserved
Password mode
0 = Password only mode
1 = Pass-Through mode
Pass-Through mode
0 = Pass-Through only mode
1 = Pass-Through mode
SEC ID Lock Out Bit
0 = locked
1 = unlocked
T8.0 25015
Note that DQ 4 , DQ 2 , DQ 1 , DQ 0 do not have to be programmed at the same time. In addition, DQ2 and
DQ1 cannot both be programmed to ‘0’. The valid combinations of states of DQ 2 and DQ 1 are shown in
Table 9.
Table 9: Valid DQ 2 and DQ 1 Combinations
Combination
DQ 2 , DQ 1 = 11
DQ 2, DQ 1 = 10
DQ 2 , DQ 1 = 01
DQ 2 , DQ 1 = 00
Definition
Pass-Through mode (factory default)
Pass-Through only mode
Password only mode
Not Allowed
T9.0 25015
The PSR can be accessed by issuing the PSR Entry command. Users can then use the PSR Program
and PSR Read commands. The PSR Exit command must be issued to leave this mode. See Table 11
for further details.
?2011 Silicon Storage Technology, Inc.
18
DS-25015A
04/11
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