MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor
7-5
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
0
W
Reset for
MPC5554
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reset for
MPC5553
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Reg Addr
Base + 0x0000 (XBAR_MPR0); 0x0100 (XBAR_MPR1); 0x0300 (XBAR_MPR3); 0x0600 (XBAR_MPR6);
0x0700 (XBAR_MPR7)
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
0
0
MSTR3
1
1
MSTR3 is supported only in the MPC5553.
0
0
MSTR2
0
0
MSTR1
0
0
MSTR0
W
Reset for
MPC5554
0
0
0
0
0
0
1
0
0
0
0
1
0
0
0
0
Reset for
MPC5553
0
0
1
1
0
0
1
0
0
0
0
1
0
0
0
0
Reg Addr
Base + 0x0000 (XBAR_MPR0); 0x0100 (XBAR_MPR1); 0x0300 (XBAR_MPR3); 0x0600 (XBAR_MPR6);
0x0700 (XBAR_MPR7)
Figure 7-2. Master Priority Registers (XBAR_MPRn)
Table 7-3. XBAR_MPRn Descriptions
Bits
Name
Description
0–17
—
Reserved, should be cleared.
18-19
MSTR3
Master 3 priority. Set the arbitration priority for master port 3 on the associated slave port.
00 This master has the highest priority when accessing the slave port.
01 This master has the 2nd highest priority when accessing the slave port
10 This master has the 3rd highest priority when accessing the slave port.
11 This master has the lowest priority when accessing the slave port.
Note: This field is supported only in the MPC5553.
Note: In the MPC5554, this master is not used. Setting its value to its reset value (0b011)
insures that it does not conflict with other master priorities.
20-21
—
Reserved, should be cleared.
22–23
MSTR2
Master 2 priority. Set the arbitration priority for master port 2 on the associated slave port.
00 This master has the highest priority when accessing the slave port.
01 This master has the 2nd highest priority when accessing the slave port
10 This master has the 3rd highest priority when accessing the slave port.
11 This master has the lowest priority when accessing the slave port.
24–25
—
Reserved, should be cleared.
Summary of Contents for MPC5553
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