NXP Semiconductors MPC5566 - Page 665

Boot Assist Module (BAM)
MPC5566 Microcontroller Reference Manual, Rev. 2
16-6 Freescale Semiconductor
The censorship word starts at address 0x00FF_FDE0 and contains a 16-bit censorship control field [0:15]
and a 16-bit serial boot control field [16:31]. The factory default settings are shown in Figure 16-2:
The BAM program reads the DISNEX bit to determine which of the following passwords to compare with
the serial password received in serial boot mode:
• Public password (64-bit constant value of 0xFEED_FACE_CAFE_BEEF); or
• Flash password (64-bit value in the shadow row of internal flash at address 0x00FF_FDD8).
Serial boot flash password starts at address 0x00FF_FDD8:
Address: 0x00FF_FDE0 Value: 0x55AA
MSB
0123456789101112131415
Binary value0101010110101010
Hex value 5 5 A A
Censorship control field–default value configures the device as uncensored.
Address: 0x00FF_FDE2 Value: 0x55AA
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Binary value0101010110101010
Hex value 5 5 A A
Serial boot control field–default value reads a password from internal flash.
Figure 16-2. Censorship Word
Address: 0x00FF_FDD8 Value: 0xFEED
MSB
0123456789101112131415
Binary value1111111011101101
Hex value F E E D
Address: 0x00FF_FDDA Value: 0xFACE
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
Binary value1111101011001110
Hex value F A C E