PXR40RM Datasheet, PDF (439/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

AMBA Crossbar Switch (XBAR)
Address Base + 0x0010 (XBAR_SGPCR0)
:
Base + 0x0110 (XBAR_SGPCR1)
Base + 0x0210 (XBAR_SGPCR2)
Base + 0x0610 (XBAR_SGPCR6)
Base + 0x0710 (XBAR_SGPCR7)
Access: R/W
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
RO¹
W
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R0
0
0
0
0
0
0
0
0
ARB
PCTL
W
PARK
Reset 0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1 _{After this bit is set, only a hardware reset clears it.}
Figure 14-3. Slave General-Purpose Control Registers (XBAR_SGPCRn)
Table 14-4. XBAR_SGPCRn Field Descriptions
Field
0
RO
1–21
22–23
ARB
24–25
26–27
PCTL
Description
Read only. Used to force all of a slave port’s registers to be read only. After written to 1, it can only be cleared by
hardware reset.
0 All this slave port’s registers can be written.
1 All this slave port’s registers are read only and cannot be written (attempted writes have no effect and result
in an error response).
Reserved, must be cleared.
Arbitration mode. Used to select the arbitration policy for the slave port. This field is initialized by hardware reset.
00 Fixed priority using MPR
01 Round-robin priority
10 Invalid value
11 Invalid value
Reserved, must be cleared.
Parking control. Used to select the parking algorithm used by the slave port. This field is initialized by hardware
reset.
00 When no master is making a request, the arbiter parks the slave port on the master port defined by the PARK
control field.
01 POL—Park on last. When no master is making a request, the arbiter parks the slave port on the last master
to own the slave port.
10 LPP—Low-power park. When no master is making a request, the arbiter parks the slave port on no master
and drives all slave port outputs to a safe state.
11 Invalid value
Freescale Semiconductor
PXR40 Microcontroller Reference Manual, Rev. 1
14-7