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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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M50FW040 Arkusz danych(PDF) 32 Page - STMicroelectronics |
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M50FW040 Arkusz danych(HTML) 32 Page - STMicroelectronics |
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32 / 53 page  Firmware hub (FWH) interface Configuration Registers M50FW040 32/53 6.7 Device Code Register Reading the Device Code Register returns the device code for the memory, 2Ch. This register is read-only and writing to it has no effect. Table 9. Firmware hub Configuration Register map Mnemonic Register Name Memory Address Default Value Access T_BLOCK_LK Top Block Lock Register (Block 7) FBF0002h 01h R/W T_MINUS01_LK Top Block [-1] Lock Register (Block 6) FBE0002h 01h R/W T_MINUS02_LK Top Block [-2] Lock Register (Block 5) FBD0002h 01h R/W T_MINUS03_LK Top Block [-3] Lock Register (Block 4) FBC0002h 01h R/W T_MINUS04_LK Top Block [-4] Lock Register (Block 3) FBB0002h 01h R/W T_MINUS05_LK Top Block [-5] Lock Register (Block 2) FBA0002h 01h R/W T_MINUS06_LK Top Block [-6] Lock Register (Block 1) FB90002h 01h R/W T_MINUS07_LK Top Block [-7] Lock Register (Block 0) FB80002h 01h R/W FGPI_REG Firmware Hub (FWH) General Purpose Input Register FBC0100h N/A R MANUF_REG Manufacturer Code Register FBC0000h 20h R DEV_REG Device Code Register FBC0001h 2Ch R Table 10. Lock Register bit definitions(1) 1. Applies to Top Block Lock Register (T_BLOCK_LK) and Top Block [-1] Lock Register (T_MINUS01_LK) to Top Block [-7] Lock Register (T_MINUS07_LK). Bit Bit name Value Function 7-3 Reserved 2 Read- Lock ‘1’ Bus Read operations in this Block always return 00h. ‘0’ Bus read operations in this Block return the Memory Array contents. (Default value). 1 Lock- Down ‘1’ Changes to the Read-Lock bit and the Write-Lock bit cannot be performed. Once a ‘1’ is written to the Lock-Down bit it cannot be cleared to ‘0’; the bit is always reset to ‘0’ following a Reset (using RP or INIT) or after power-up. ‘0’ Read-Lock and Write-Lock can be changed by writing new values to them. (Default value). 0 Write- Lock ‘1’ Program and Erase operations in this Block will set an error in the Status Register. The memory contents will not be changed. (Default value). ‘0’ Program and Erase operations in this Block are executed and will modify the Block contents. |
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