參數(shù)資料
型號(hào)： S29CL032J0RQAM013
廠商： SPANSION LLC
元件分類(lèi)： PROM
英文描述： 1M X 32 FLASH 3.3V PROM, 48 ns, PQFP80
封裝： PLASTIC, MO-108CB-1, QFP-80
文件頁(yè)數(shù)： 44/79頁(yè)
文件大?。?/td> 2994K
代理商： S29CL032J0RQAM013
March 30, 2009 S29CD-J_CL-J_00_B3
S29CD-J & S29CL-J Flash Family
49
Data
She e t
Silicon sector if the overlayed sector was undergoing programming or erasure. The host system
must ensure that the device resume any suspended program or erase operation after exiting the
Secured Silicon sector.
10.1
Secured Silicon Sector Protection Bit
The Secured Silicon Sector can be shipped unprotected, allowing customers to utilize that sector in any
manner they choose.
Please note the following:
The Secured Silicon Sector can be read any number of times, but can be programmed and locked only
once. The Secured Silicon Sector Protection Bit must be used with caution as once locked, there is no
procedure available for unlocking the Secured Silicon Sector area and none of the bits in the Secured
Silicon Sector memory space can be modified in any way.
Once the Secured Silicon Sector is locked and verified, the system must write the Exit Secured Silicon
Sector Region command sequence to return the device to the memory array.
10.2
Secured Silicon Sector Entry and Exit Commands
The system can access the Secured Silicon Sector region by issuing the three-cycle Enter Secured Silicon
Sector command sequence. The device continues to access the Secured Silicon Sector region until the
system issues the four-cycle Exit Secured Silicon Sector command sequence. See the Table 20.1, Memory
(x32 Mode), on page 74 for address and data requirements for both command sequences.
The Secured Silicon Sector Entry Command allows the following commands to be executed
Read Secured Silicon areas
Program Secured Silicon Sector (only once)
After the system has written the Enter Secured Silicon Sector command sequence, it can read the Secured
Silicon Sector by using the addresses listed in Table 10.1, Secured Silicon Sector Addresses on page 48.
This mode of operation continues until the system issues the Exit Secured Silicon Sector command
sequence, or until power is removed from the device.
11. Electronic Marking
Electronic marking has been programmed into the device, prior to shipment from Spansion, to ensure
traceability of individual products. The electronic marking is stored and locked within a one-time
programmable region. Detailed information on Electronic Marking will be provided in a data sheet
supplement.
12. Power Conservation Modes
12.1
Standby Mode
When the system is not reading or writing to the device, it can place the device in standby mode. In this mode,
current consumption is greatly reduced, and outputs are placed in a high impedance state, independent of
OE# input. The device enters CMOS standby mode when the CE# and RESET# inputs are both held at
VCC ± 10%. The device requires standard access time (tCE) for read access before it is ready to read data. If
the device is deselected during erasure or programming, the device draws active current until the operation is
completed.
specification.
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