參數(shù)資料
型號： JS28F640P30T85
廠商： INTEL CORP
元件分類： DRAM
英文描述： Intel StrataFlash Embedded Memory
中文描述： 4M X 16 FLASH 1.8V PROM, 85 ns, PDSO56
封裝： 14 X 20 MM, LEAD FREE, TSOP-56
文件頁數(shù)： 74/102頁
文件大小： 1609K
代理商： JS28F640P30T85
1-Gbit P30 Family
April 2005
74
Intel StrataFlash
Embedded Memory (P30)
Order Number: 306666, Revision: 001
Datasheet
The device programs the 64-bit and 128-bit user-programmable Protection Register data 16 bits at
a time (see
Figure 47, “Protection Register Programming Flowchart” on page 92
). Issuing the
Program Protection Register command outside of the Protection Register’s address space causes a
program error (SR[4] set). Attempting to program a locked Protection Register causes a program
error (SR[4] set) and a lock error (SR[1] set).
13.3.3
Locking the Protection Registers
Each Protection Register can be locked by programming its respective lock bit in the Lock
Register. To lock a Protection Register, program the corresponding bit in the Lock Register by
issuing the Program Lock Register command, followed by the desired Lock Register data (see
Section 9.2, “Device Commands” on page 50
). The physical addresses of the Lock Registers are
0x80 for register 0 and 0x89 for register 1. These addresses are used when programming the lock
registers (see
Table 29, “Device Identifier Information” on page 77
).
Bit 0 of Lock Register 0 is already programmed at the factory, locking the lower, pre-programmed
64-bit region of the first 128-bit Protection Register containing the unique identification number of
the device. Bit 1 of Lock Register 0 can be programmed by the user to lock the user-programmable,
64-bit region of the first 128-bit Protection Register. When programming Bit 1 of Lock Register 0,
all other bits need to be left as ‘1’ such that the data programmed is 0xFFFD.
Lock Register 1 controls the locking of the upper sixteen 128-bit Protection Registers. Each of the
16 bits of Lock Register 1 correspond to each of the upper sixteen 128-bit Protection Registers.
Programming a bit in Lock Register 1 locks the corresponding 128-bit Protection Register.
Caution:
After being locked, the Protection Registers cannot be unlocked.
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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