PXS20RM Datasheet, PDF (300/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Crossbar Switch (XBAR)
Always 1 Always 0 R/W BIT Read- BIT Write-
Write 1 BIT Self-clear 0 N/A
reads 1
reads 0
bit
only bit
only bit _BIT to clear _w1c
bit _BIT
‘
Figure 15-1. Key to Register Fields
Table 15-5. XBAR register summary
Name
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
MPRn R 0
MSTR_7
0
MSTR_6
0
MSTR_5
0
MSTR_4
($BASE + 0x000 _W
+ n*0x100)
R0
MSTR_3
0
MSTR_2
0
MSTR_1
0
MSTR_0
W
SGPCRn R 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
($BASE + 0x010 _{W RO HLP}
+ n*0x100)
HPE7HPE6HPE5HPE4HPE3HPE2HPE1HPE0
R0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W
ARB
PCTL
PARK
MGPCRn R 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
($BASE + 0x800 _W
+ n*0x100
R0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
W
AULB
Note: for n = 0 to 7
15.3.2 XBAR register descriptions
The following paragraphs provide detailed descriptions of the various XBAR registers.
Table 15-6 provides a key to the terms found in XBAR registers.
Table 15-6. Register terms
Term
Gray bit
Access
S
—
Type
r
w
rw
rwm
w1c
Description
Unimplemented bit; always reads as zero;writing has no effect
Supervisor mode only
Supervisor or user mode
Read only; writing to this bit has no effect
Write only
Standard read/write bit. Only software can change a bit’s value (other than
a hardware reset).
A read/write bit that may be modified by hardware in some fashion other
than reset.
A status bit that can be read and cleared by writing a logic 1
15-6
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor