PXS20RM Datasheet, PDF (1346/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

System Status and Configuration Module (SSCM)
48.3.1.7 Boot Key Register (DPMKEY)
Address: Base + 0x001C
Access: Read/Write
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
RESET: 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
KEY
RESET: 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
= Writes have no effect on this bit
Figure 48-9. Boot Key Register (DPMKEY) Register
Table 48-14. DPMKEY Field Descriptions
Field
Description
KEY
Control key.
This field is used to activate the second core in DP Mode.
The sequence following sequece is required:
- write to the DPMBOOT register
- write the value 0101101011110000 (0x5AF0) to the key field
- write the value 1010010100001111 (0xA50F) to the key field
After this the second core will start executing from the address specified in the DPMBOOT register.
48-10
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor