Flash Memory
MPC5606S Microcontroller Reference Manual, Rev. 7
Freescale Semiconductor
593
•
The Non-volatile Modify Protection Registers are physically located in Test flash their bits can be
programmed to 0 only once and they can no more be restored to 1.
•
The Volatile Modify Protection Registers are Read/Write registers which bits can be written at 0 or
1 by the user application.
A software mechanism is provided to independently lock/unlock each Low, Mid and High Address Space
Block against program and erase.
Software locking is done through the LML (Low/Mid Address Space Block Lock Register) or HBL (High
Address Space Block Lock Register) registers.
An alternate means to enable software locking for blocks of Low Address Space only is through the SLL
(Secondary Low/Mid Address Space Block Lock Register).
All these registers have a non-volatile image stored in Test flash (NVLML, NVHBL, NVSLL), so that the
locking information is kept on reset.
On delivery the Test flash non-volatile image is at all 1s, meaning all sectors are locked.
By programming the non-volatile locations in Test flash the selected sectors can be unlocked.
Being the Test flash One Time Programmable (that is, not erasable), once unlocked the sectors cannot be
locked again.
Of course, on the contrary, all the volatile registers can be written at 0 or 1 at any time, therefore the user
application can lock and unlock sectors when desired.
17.2.7.3.2
Censored mode
The Censored mode information is stored in non-volatile flash memory cells located in the Shadow block.
This information is read once during the flash memory initialization phase following the exit from Reset
and is stored in Volatile registers that act as actuators.
The reset state of all the volatile censored mode registers is the protected state.
All the non-volatile Censored mode registers can be programmed through a normal double word program
operation at the related locations in the Shadow block.
The non-volatile Censored mode registers can be erased by erasing the Shadow block.
•
The non-volatile Censored mode registers are physically located in the Shadow block their bits can
be programmed to 0 and eventually restored to 1 by erasing the Shadow block.
•
The Volatile Censored mode registers are registers not accessible by the user application.
The flash memory macrocell provides two levels of protection against piracy:
•
If bits CW15-0 of NVSCI0 are programmed at 0x55AA and NVSC1 = NVSCI0 the Censored
mode is disabled, while all the other possible values enable the Censored mode.
•
If bits SC15-0 of NVSCI0 are programmed at 0x55AA and NVSC1 = NVSCI0 the Public Access
is disabled, while all the other possible values enable the Public Access.
The parts are delivered to the user with Censored mode and Public Access disabled.
Содержание MPC5602S
Страница 76: ...Overview MPC5606S Microcontroller Reference Manual Rev 7 74 Freescale Semiconductor...
Страница 82: ...Memory Map MPC5606S Microcontroller Reference Manual Rev 7 80 Freescale Semiconductor...
Страница 112: ...Signal Description MPC5606S Microcontroller Reference Manual Rev 7 110 Freescale Semiconductor...
Страница 166: ...Analog to Digital Converter ADC MPC5606S Microcontroller Reference Manual Rev 7 164 Freescale Semiconductor...
Страница 182: ...Boot Assist Module BAM MPC5606S Microcontroller Reference Manual Rev 7 180 Freescale Semiconductor...
Страница 234: ...Clock Description MPC5606S Microcontroller Reference Manual Rev 7 232 Freescale Semiconductor...
Страница 286: ...Crossbar Switch XBAR MPC5606S Microcontroller Reference Manual Rev 7 284 Freescale Semiconductor...
Страница 470: ...e200z0h Core MPC5606S Microcontroller Reference Manual Rev 7 468 Freescale Semiconductor...
Страница 524: ...Enhanced Direct Memory Access eDMA MPC5606S Microcontroller Reference Manual Rev 7 522 Freescale Semiconductor...
Страница 546: ...Error Correction Status Module ECSM MPC5606S Microcontroller Reference Manual Rev 7 544 Freescale Semiconductor...
Страница 669: ...Flash Memory MPC5606S Microcontroller Reference Manual Rev 7 Freescale Semiconductor 667...
Страница 670: ...Flash Memory MPC5606S Microcontroller Reference Manual Rev 7 668 Freescale Semiconductor...
Страница 716: ...FlexCAN MPC5606S Microcontroller Reference Manual Rev 7 714 Freescale Semiconductor...
Страница 882: ...LIN Controller LINFlex MPC5606S Microcontroller Reference Manual Rev 7 880 Freescale Semiconductor...
Страница 901: ...Memory Protection Unit MPU MPC5606S Microcontroller Reference Manual Rev 7 Freescale Semiconductor 899...
Страница 902: ...Memory Protection Unit MPU MPC5606S Microcontroller Reference Manual Rev 7 900 Freescale Semiconductor...
Страница 955: ...Mode Entry Module MC_ME MPC5606S Microcontroller Reference Manual Rev 7 Freescale Semiconductor 953...
Страница 956: ...Mode Entry Module MC_ME MPC5606S Microcontroller Reference Manual Rev 7 954 Freescale Semiconductor...
Страница 1072: ...Quad Serial Peripheral Interface QuadSPI MPC5606S Microcontroller Reference Manual Rev 7 1070 Freescale Semiconductor...
Страница 1096: ...Reset Generation Module MC_RGM MPC5606S Microcontroller Reference Manual Rev 7 1094 Freescale Semiconductor...
Страница 1106: ...Real Time Clock RTC API MPC5606S Microcontroller Reference Manual Rev 7 1104 Freescale Semiconductor...
Страница 1186: ...Stepper Stall Detect SSD MPC5606S Microcontroller Reference Manual Rev 7 1184 Freescale Semiconductor...
Страница 1213: ...System Integration Unit Lite SIUL MPC5606S Microcontroller Reference Manual Rev 7 Freescale Semiconductor 1211...
Страница 1214: ...System Integration Unit Lite SIUL MPC5606S Microcontroller Reference Manual Rev 7 1212 Freescale Semiconductor...
Страница 1238: ...Voltage Regulators and Power Supplies MPC5606S Microcontroller Reference Manual Rev 7 1236 Freescale Semiconductor...
Страница 1252: ...Wakeup Unit WKPU MPC5606S Microcontroller Reference Manual Rev 7 1250 Freescale Semiconductor...
Страница 1258: ...Registers Under Protection MPC5606S Microcontroller Reference Manual Rev 7 1256 Freescale Semiconductor...
Страница 1323: ...Register Map MPC5606S Microcontroller Reference Manual Rev 7 Freescale Semiconductor 1321...
Страница 1324: ...Register Map MPC5606S Microcontroller Reference Manual Rev 7 1322 Freescale Semiconductor...