Boot Assist Module (BAM)
MPC5565 Microcontroller Reference Manual, Rev. 1.0
15-6
Freescale Semiconductor
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:
The BAM program continues to make specific initialization in one of the four boot modes.
15.3.2.1
Internal Boot Mode
When the BAM detects internal flash boot mode, a bus error exception handler is invoked to handle corrupt
data from internal flash memory and avoid a bus error. The BAM program reads up to six addresses in
internal flash to find a valid 16-bit reset configuration halfword (RCHW). If a valid RCHW is read, the
BAM program sets the e200z6 watchdog timer enable bit RCHW[WTE]. If a valid RCHW is not read, the
BAM program proceeds to serial boot mode.
Address: 0x00FF_FDD8
Value: 0xFEED
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Binary value
1
1
1
1
1
1
1
0
1
1
1
0
1
1
0
1
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 value
1
1
1
1
1
0
1
0
1
1
0
0
1
1
1
0
Hex
value
F A C E
Address: 0x00FF_FDDC
Value: 0xCAFE
MSB
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
Binary value
1
1
0
0
1
0
1
0
1
1
1
1
1
1
1
0
Hex value
C
A
F
E
Address: 0x00FF_FDDE
Value: 0xBEEF
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
Binary value
1
0
1
1
1
1
1
0
1
1
1
0
1
1
1
1
Hex
value
B E E F
Figure 15-3. Serial Boot Flash Password
Summary of Contents for MPC5565
Page 18: ...MPC5565 Microcontroller Reference Manual Devices Supported MPC5565 MPC5565 RM Rev 1 0 09 2007...
Page 34: ...MPC5565 Reference Manual Rev 1 0 Freescale Semiconductor 15...
Page 35: ...MPC5565 Reference Manual Rev 1 0 16 Freescale Semiconductor...
Page 553: ...Flash Memory MPC5565 Microcontroller Reference Manual Rev 1 0 13 38 Freescale Semiconductor...
Page 559: ...SRAM MPC5565 Microcontroller Reference Manual Rev 1 0 14 6 Freescale Semiconductor...
Page 973: ...Preface MPC5565 Microcontroller Reference Manual Rev 1 0 21 36 Freescale Semiconductor...
Page 1153: ...Calibration MPC5565 Microcontroller Reference Manual Rev 1 0 B 8 Freescale Semiconductor...