
Crossbar Switch (XBS)
12-4
Freescale Semiconductor
12.4.1
XBS Priority Registers (XBS_PRS
n
)
The priority registers (XBS_PRS
n
) set the priority of each master port on a per slave port basis and reside
in each slave port. The priority register can be accessed only with 32-bit accesses. After the
XBS_CRS
n
[RO] bit is set, the XBS_PRS
n
register can only be read; attempts to write to it have no effect
on XBS_PRS
n
and result in a bus-error response to the master initiating the write.
Additionally, no two available master ports may be programmed with the same priority level, including
reserved masters. Attempts to program two or more masters with the same priority level result in a
bus-error response (see
Section 11.2.7, “SCM Interrupt Status Register (SCMISR)”
) and the XBS_PRS
n
is not updated.
0xFC00_4600
Priority Register Slave 6 (XBS_PRS6)
32
R/W
0x6543_0210
0xFC00_4610
Control Register Slave 6 (XBS_CRS6)
32
R/W
0x0000_0000
0xFC00_4700
Priority Register Slave 7 (XBS_PRS7)
32
R/W
0x6543_0210
0xFC00_4710
Control Register Slave 7 (XBS_CRS7)
32
R/W
0x0000_0000
Address: 0xFC00_4100 (XBS_PRS1)
0xFC00_4400 (XBS_PRS4)
0xFC00_4600 (XBS_PRS6)
0xFC00_4700 (XBS_PRS7)
Access: Supervisor read/write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
R 0
M7
0
M6
0
M5
0
M4
0 0 0 0 0
M2
0
M1
0
M0
W
Reset 0 1 1 0 0 1 0 1 0 1 0 0 0 0 1 1 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0
Figure 12-2. XBS Priority Registers Slave n (XBS_PRSn)
Table 12-3. XBS_PRSn Field Descriptions
Field
Description
31
Reserved, must be cleared.
30–28
M7
Master 7 (Factory Test) 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.
011 This master has level 4 priority when accessing the slave port.
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 (lowest) priority when accessing the slave port.
Else Reserved
27
Reserved, must be cleared.
26–24
M6
Master 6 (USB OTG) priority. See M7 description.
Table 12-2. XBS Memory Map (continued)
Address
Register
Width
(bits)
Access
Reset Value
Section/Page
MCF5329 Reference Manual, Rev 3
Содержание MCF5329
Страница 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 126: ...Enhanced Multiply Accumulate Unit EMAC 4 20 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 564: ...Liquid Crystal Display Controller LCDC 22 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 692: ...Programmable Interrupt Timers PIT0 PIT3 28 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 720: ...Queued Serial Peripheral Interface QSPI 30 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 790: ...Message Digest Hardware Accelerator MDHA 33 20 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 902: ...Register Memory Map Quick Reference A 26 Freescale Semiconductor MCF5329 Reference Manual Rev 3...