PXS20RM Datasheet, PDF (1340/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

System Status and Configuration Module (SSCM)
Table 48-3. STATUS field descriptions (continued)
Field
Description
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
VLE Variable Length Instruction Mode. When booting from Flash, this field indicates that the code stored there is using
the VLE instruction set. The value of this field is determined by the RCHW field of the Flash boot sector.
1 Main Flash contains VLE code
0 Main Flash contains standard PPC code
BMODE
Device Boot Mode.
000 (reserved for FlexRay Boot Serial Boot Loader)
001 CAN Serial Boot Loader
010 SCI Serial Boot Loader
011 Single Chip
100 Expanded Chip
This field is only updated during reset.
ABD Autobaud. Indicates that autobaud detection is active when in SCI or CAN serial boot loader mode. No meaning in
other modes.
Note: Autobaud functionality is not supported on this chip.
48.3.1.2 System Memory and ID Register (MEMCONFIG)
The System Memory Configuration register is a read-only register that reflects the memory configuration
of the system. It also contains the JTAG ID.
Address Base + 0x0002
Access: Read Only
R₀
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
JPIN
IVLD
MREV
0
W
RESET: 0/1¹ 0/1¹ 0/1¹ 0/1¹ 0/1¹ 0/1¹ 0/1¹ 0/1¹ 0/1¹ 0/1¹ 0/1² 0/1¹ 0/1¹ 0/1¹ 0/1¹ 0
= Reserved
Figure 48-3. System Memory and ID (MEMCONFIG) Register
NOTES:
1 _{Reset value is SOC-specific.}
2 _{Reset value depends on boot mode and security status (see SOC documentation).}
48-4
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor