NXP Semiconductors MPC5644A, Reference Manual, Page: 237 / 1735

Flash memory
MPC5644A Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor 237
12.3.2.9 Bus Interface Unit Access Protection Register (BIUAPR)
Offset: FLASH_REG 0x0020 Access: User read/write
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R 0 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
R 0 0
M6AP
0 0
M4AP
0 0 0 0
M1AP M0AP
W
Reset 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1
Figure 12-11. Bus Interface Unit Access Protection Register (BIUAPR)
Table 12-13. BIUAPR field descriptions
Field Description
M n AP Master n Access Protection
These fields are used to control whether read and write accesses to the flash are allowed based on
the master ID of a requesting master.
00: No accesses may be performed by this master
01: Only read accesses may be performed by this master
10: Only write accesses may be performed by this master
11: Both read and write accesses may be performed by this master
Note: These bits refer to the master ID, not the master port number, as shown in the following:
Master ID Module
0 z4 Core Instruction
1 z4 Core Load/Store
4 eDMA
6 FlexRay
7 External Bus Interface (EBI)