NXP Semiconductors MPC5606S - Chapter 38; System Status Register (STATUS)

System Status and Configuration Module (SSCM)
MPC5606S Microcontroller Reference Manual, Rev. 7
Freescale Semiconductor 1215
38.2.2.1 System Status Register (STATUS)
The System Status register is a read-only register that reflects the current state of the system.
38.2.2.2 System Memory Configuration Register
The System Memory Configuration register is a read-only register that reflects the memory configuration
of the system.
Address: Base + 0x0000 Access: Read Only
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
R
0 0 0 0
NXE
N
PUB SEC 0 BMODE[2:0] 0 ABD 0 0 0
W
RESET: 0 0 0 0 0 0 0 0 0/1 0/1 0/1 0 0 0 0 0
Figure 38-2. Status (STATUS) Register
Table 38-2. STATUS Allowed Register Accesses
8-bit 16-bit 32-bit
1
1
All 32-bit accesses must be aligned to 32-bit addresses (i.e. 0x0, 0x4, 0x8 or 0xC).
READ Allowed Allowed Allowed
WRITE Not Allowed Not Allowed Not Allowed
Table 38-3. STATUS field descriptions
Field Description
4
NXEN
Nexus enabled.
PUB Public Serial Access Status. This bit indicates whether serial boot mode with public password is allowed.
0 Serial boot mode with private Flash password is allowed, provided the key hasn’t been swallowed
1 Serial boot mode with public password is allowed
SEC Security Status. This bit reflects the current security state of the Flash.
0 The Flash is not secured
1 The Flash is secured
8-10
BMODE
[0:2]
Device Boot Mode.
000 Reserved for FlexRay Boot Serial Boot Loader
001 legacy bootstrap via CAN
010 legacy bootstrap via UART
011 Single Chip
100–111 Reserved
This field is only updated during reset.
12
ABD
Autobaud. Indicates that autobaud detection is active when in SCI or CAN serial boot loader mode. No
meaning in other modes.