ST SPC560P34 - Table 78. STATUS Allowed Register Accesses; Table 79. STATUS Field Descriptions; Figure 90. Status (STATUS) Register

System Status and Configuration Module (SSCM) RM0046
242/936 Doc ID 16912 Rev 5
System Status register (STATUS)
The system status register is a read-only register that reflects the current state of the
system.
Figure 90. Status (STATUS) register
Address: Base + 0x0000 Access: Read-only
0123456789101112131415
R0 0 0 0
NXEN
PUB SEC 0 BMODE[2:0] 0 ABD 0 0 0
W
RESET:0000000001100000
Table 78. STATUS allowed register accesses
Access type
Access width
8-bit 16-bit 32-bit
(1)
Read Allowed Allowed Allowed
Write Not allowed Not allowed Not allowed
1. All 32-bit accesses must be aligned to 32-bit addresses (i.e., 0x0, 0x4, 0x8, or 0xC).
Table 79. STATUS field descriptions
Field Description
NXEN Nexus enabled
PUB
Public Serial Access Status
This bit indicates whether serial boot mode with public password is allowed.
1: Serial boot mode with public password allowed
0: Serial boot mode with private Flash password allowed, provided the key has not been swallowed
SEC
Security Status
This bit reflects the current security state of the Flash.
1: Flash secured
0: Flash not secured
BMODE
[2:0]
Device Boot Mode
000: TestFlash
001: CAN Serial Boot Loader
010: SCI Serial Boot Loader
011: Single Chip
100–111: Reserved
This field is updated only during reset.
ABD
Autobaud
Indicates that autobaud detection is active when in SCI or CAN serial boot loader mode. No meaning in
other modes.