参数资料
型号: RCPXA272FC0520
厂商: MARVELL SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 520 MHz, MICROPROCESSOR, PBGA336
封装: 14 X 14 MM, 1.55 MM HEIGHT, 0.65 MM PITCH, LEAD FREE, CSP-336
文件页数: 125/138页
文件大小: 1048K
代理商: RCPXA272FC0520
Part 2: Flash Device Operations
Flash Security Modes
Intel PXA27x Processor Family Memory Subsystem
87
13.2.2
Flash Programming of the Protection Registers
To program any of the Protection Registers, first issue the Program Protection Register command
at the parameter partition’s base address plus the offset to the desired Protection Register (see
Section 9.3, “Flash Command Definitions” on page 66). Next, write the desired Protection Register
data to the same Protection Register address (see Figure 28, “Flash One-Time Programmable
The flash programs the 64-bit and 128-bit user-programmable Protection Register data 16 bits at a
Flowchart” on page 120). 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).
Note:
If a program or erase operation occurs when programming a Protection Register, certain
details.
13.2.3
Flash 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 9.3, “Flash Command Definitions” on page 66). The physical addresses of the Lock
Registers are 0x80 for register 0 and 0x89 for register 1. These addresses are used when
Bit 0 of Lock Register 0 is already programmed at the factory, locking the lower, pre-programmed
64-bits region of the first 128-bit Protection Register containing the unique identification number
of the flash. Bit 1 of Lock Register 0 can be programmed by the user to lock the user-
programmable, 64-bits region of the first 128-bits Protection Register. The other bits in Lock
Register 0 are not used.
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.
相关PDF资料
PDF描述
RCPXA273FC0416 416 MHz, MICROPROCESSOR, PBGA336
RCPXA273FC0520 520 MHz, MICROPROCESSOR, PBGA336
RCPXA272FC0312 312 MHz, MICROPROCESSOR, PBGA336
RCPXA271FC0312 312 MHz, MICROPROCESSOR, PBGA336
RCPXA271FC0416 416 MHz, MICROPROCESSOR, PBGA336
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