
Boot Assist Module (BAM)
MPC5566 Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor
16-5
The boot mode determines the following:
•
Enables or disables internal flash memory
•
Enables or disables the Nexus port
•
Compares the password received in serial boot mode to a preset public password or a
programmable password located in internal flash
summarizes the different boot modes.
The 32-bit censorship word, which contains the censorship control and serial boot control fields, is read
and interpreted during the boot process. Its value is used in conjunction with the BOOTCFG[0:1] values
to enable or disable the internal flash memory and the Nexus interface. The censorship word is
programmed at the factory to contain 0x55AA_55AA, which uses a password in internal flash to activate
serial boot mode for an uncensored (public) device.
Table 16-3. Boot Modes
BOOTCFG
[0:1]
Censorship
Control
0x00FF_FDE0
Serial Boot
Control
0x00FF_FDE2
Boot Mode Name
Internal
Flash
State
Nexus
State
Serial
Password
00
!0x55AA
1
1
‘!’ = ‘NOT,’ as in !0x55AA, which means all values except 0x55AA. Do not use 0x0000 or 0xFFFF for the value of the
censorship control or serial boot control words.
Any value
Internal—Censored
Enabled
Disabled
Flash
0x55AA
Internal—Public
Enabled
Enabled
Public
01
Any value
0x55AA
Serial—Flash password
Enabled
Disabled
Flash
!0x55AA
Serial—Public password
Disabled
Enabled
Public
10
!0x55AA
Any value
External—No arbitration—Censored
Disabled
Enabled
Public
0x55AA
External—No arbitration—Public
Enabled
Enabled
Public
11
!0x55AA
Any value
External—External arbitration
—Censored
Disabled
Enabled
Public
0x55AA
External—External arbitration
—Public
Enabled
Enabled
Public
Содержание MPC5566
Страница 12: ...MPC5566 Microcontroller Reference Manual Devices Supported MPC5566 MPC5566 RM Rev 2 0 23 Apr 2008...
Страница 81: ...Introduction MPC5566 Microcontroller Reference Manual Rev 2 1 24 Freescale Semiconductor...
Страница 135: ...Signal Description MPC5566 Microcontroller Reference Manual Rev 2 2 54 Freescale Semiconductor...
Страница 189: ...Reset MPC5566 Microcontroller Reference Manual Rev 2 4 20 Freescale Semiconductor...
Страница 331: ...System Integration Unit SIU MPC5566 Microcontroller Reference Manual Rev 2 6 128 Freescale Semiconductor...
Страница 343: ...Crossbar Switch XBAR MPC5566 Microcontroller Reference Manual Rev 2 7 12 Freescale Semiconductor...
Страница 361: ...Error Correction Status Module ECSM MPC5566 Microcontroller Reference Manual Rev 2 8 18 Freescale Semiconductor...
Страница 455: ...Interrupt Controller INTC MPC5566 Microcontroller Reference Manual Rev 2 10 42 Freescale Semiconductor...
Страница 603: ...Flash Memory MPC5566 Microcontroller Reference Manual Rev 2 13 38 Freescale Semiconductor...
Страница 609: ...SRAM MPC5566 Microcontroller Reference Manual Rev 2 14 6 Freescale Semiconductor...
Страница 679: ...Boot Assist Module BAM MPC5566 Microcontroller Reference Manual Rev 2 16 20 Freescale Semiconductor...
Страница 997: ...Deserial Serial Peripheral Interface DSPI MPC5566 Microcontroller Reference Manual Rev 2 20 72 Freescale Semiconductor...
Страница 1037: ...Enhanced Serial Communication Interface eSCI MPC5566 Microcontroller Reference Manual Rev 2 21 40 Freescale Semiconductor...
Страница 1073: ...MPC5566 Microcontroller Reference Manual Rev 2 22 36 Freescale Semiconductor...
Страница 1081: ...Voltage Regulator Controller VRC and POR Module MPC5566 Microcontroller Reference Manual Rev 2 23 8 Freescale Semiconductor...
Страница 1093: ...IEEE 1149 1 Test Access Port Controller JTAGC MPC5566 Microcontroller Reference Manual Rev 2 24 12 Freescale Semiconductor...
Страница 1185: ...Nexus MPC5566 Microcontroller Reference Manual Rev 2 25 92 Freescale Semiconductor...
Страница 1267: ...MPC5566 Reference Manual Revision History MPC5566 Microcontroller Reference Manual Rev 2 Freescale Semiconductor C 10...
Страница 1268: ...MPC5566 Reference Manual Revision History MPC5566 Microcontroller Reference Manual Rev 2 Freescale Semiconductor C 11...