Table 134. Xbar_Crsn Field Descriptions - STMicroelectronics SPC572L series Reference Manual

RM0400
Field
28
This read-only bit is reserved and always has the value zero.
Reserved
Master 0 priority. Sets the arbitration priority for this port on the associated slave port:
000 This master has level 1 (highest) priority when accessing the slave port.
001 This master has level 2 priority when accessing the slave port.
010 This master has level 3 priority when accessing the slave port.
29–31
011 This master has level 4 priority when accessing the slave port.
M0
100 This master has level 5 priority when accessing the slave port.
101 This master has level 6 priority when accessing the slave port.
110 This master has level 7 priority when accessing the slave port.
111 This master has level 8 (lowest) priority when accessing the slave port.
14.1.2.2 XBAR Control Register (XBAR_CRSn)
Offset: 0x0010 + n*0x100 (n = 0 to 7)
0 1
R
RO HRP
W
Reset 0 0
16 17
R 0 0
W
Reset 0 0
Field
Read only
Forces both of the slave port's registers to be read-only. After set, only a hardware reset clears it.
0
0 The slave port's registers are writable.
RO
1 The slave port's registers are read-only and cannot be written (attempted writes have no effect
on the registers and result in a bus error response).
Halt Request Priority
Determines if a request to halt the crossbar is treated as the highest priority request, or the
1
lowest priority request.
HRP
0 The halt request has the highest priority for arbitration on this slave port.
1 The halt request has the lowest initial priority for arbitration on this slave port.
2–7
This read-only bitfield is reserved and always has the value zero.
Reserved
Table 133. XBAR_PRSn field descriptions(Continued)
2 3 4 5
0 0 0 0
0 0 0 0
18 19 20 21
0 0 0 0
0 0 0 0
Figure 76. XBAR Control Register (XBAR_CRSn)

Table 134. XBAR_CRSn field descriptions

DocID027809 Rev 4
Description
6 7 8 9
0 0
0 0 1 1
22 23 24 25
0
ARB
0 0 0 0
Description
Crossbar Switch (XBAR)
Access: Supervisor read/write
10 11 12 13
HPEx
1 1 1 1
26 27 28 29
0
PCTL
0 0 0 0
14 15
1 1
30 31
PARK
0 0
313/2058
317