PXD10RM Datasheet, PDF (1225/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

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.
Address: Base + 0x0000
0
1
2
R₀
0
0
W
RESET: ₀
0
0
3
4
5
6
7
0 NXEN PUB SEC 0
8
9
10
BMODE[2:0]
Access: Read Only
11
12
13
14
15
0 ABD 0
0
0
0
0
0
0
0
0/1 0/1 0/1
0
0
0
0
0
= Reserved
Figure 38-2. Status (STATUS) Register
Table 38-2. STATUS Allowed Register Accesses
8-bit
16-bit
READ
Allowed
Allowed
WRITE
Not Allowed
Not Allowed
1 _{All 32-bit accesses must be aligned to 32-bit addresses (i.e. 0x0, 0x4, 0x8 or 0xC).}
32-bit¹
Allowed
Not Allowed
Table 38-3. STATUS Field Descriptions
Field
Description
4 Nexus enabled.
NXEN
PUB
Public Serial Access Status. This bit indicates whether serial boot mode with public password is allowed.
1 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
SEC
Security Status. This bit reflects the current security state of the Flash.
1 The Flash is secured
0 The Flash is not secured
8-10 Device Boot Mode.
BMODE 000 reserved for FlexRay Boot Serial Boot Loader
[0:2] 001 legacy bootstrap via CAN
010 legacy bootstrap via UART
011 Single Chip
100 - 111 Reserved
This field is only updated during reset.
12 Autobaud. Indicates that autobaud detection is active when in SCI or CAN serial boot loader mode. No
ABD meaning in other modes.
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.
Freescale Semiconductor
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
38-3