PXS20RM Datasheet, PDF (1338/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

System Status and Configuration Module (SSCM)
• Debug Status Port enable and selection
• Bus and peripheral abort enable/disable
48.1.3 Modes of operation
The SSCM operates identically in all system modes.
48.2 External signal description
The SSCM has no external pins.
48.3 Memory map/register definition
This section provides a detailed description of all memory-mapped registers in the SSCM.
Table 48-1 shows the memory map for the SSCM. Note that all addresses are offsets; the absolute address
may be calculated by adding the specified offset to the base address of the SSCM.
Table 48-1. Module memory map
Address
Register
Size
Access
Mode
1
Base + 0x0000
System Status (STATUS)
16 bits
R/W
A
Base + 0x0002
System Memory and ID (MEMCONFIG)
16 bits
R
A
Base + 0x0004
Reserved
16 bits Reads/Writes have no
A
effect.
Base + 0x0006
Error Configuration (ERROR)
16 bits
R/W
A
Base + 0x0008
Debug Status Port (DEBUGPORT)
16 bits
R/W
A
Base + 0x000A
Reserved
16 bits Reads/Writes have no
A
effect.
Base + 0x000C Password Comparison Register High Word 32 bits
R/W
A
Base + 0x0010 Password Comparison Register Low Word 32 bits
R/W
A
Base + 0x0014
Reserved
32 bits Reads/Writes have no
A
effect.
Base + 0x0018
DPM Boot Register
32 bits
R
A
Base + 0x001C
DPM Boot Key Register
32 bits
R
A
Base + 0x0020
User Option Status Register
32 bits
R
A
Base + 0x0024
Base + 0x0028
to
Base + 0x3FFF
SSCM Control Register
Reserved
32 bits
R/W
A
See Note ²
NOTES:
1 _{U = User Mode, S = Supervisor Mode, T = Test Mode, V = DFV Mode, A = All (No restrictions)}
2 _{If enabled at the SoC level, accessing these register addresses will cause bus aborts.}
All registers are accessible via 8-bit, 16-bit or 32-bit accesses unless otherwise noted. However, 16-bit
accesses must be aligned to 16-bit boundaries, and 32-bit accesses must be aligned to 32-bit boundaries.
As an example, the STATUS register is accessible by a 16-bit READ/WRITE to address ’Base + 0x0002’,
but performing a 16-bit access to ’Base + 0x0003’ is illegal.
48-2
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor