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MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
14-20
Freescale Semiconductor
14.3.4.2.8
MIB Control Register (MIBC)
The MIBC is a read/write register used to provide control of and to observe the state of the MIB block.
This register is accessed by user software if there is a need to disable the MIB block operation. For
example, in order to clear all MIB counters in RAM the user should disable the MIB block, then clear all
the MIB RAM locations, then enable the MIB block. The MIB_DISABLE bit is reset to 1. See
for the locations of the MIB counters.
14.3.4.2.9
Receive Control Register (RCR)
The RCR is programmed by the user. The RCR controls the operational mode of the receive block and
should be written only when ECR[ETHER_EN] = 0 (initialization time).
100 MHz
0xA
2.5 MHz
132 MHz
0xD
2.5 MHz
0 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R MIB_DISABLE
MIB_IDLE
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Address
Base + 0x0064
16 17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
R
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Address
Base + 0x0064
Figure 14-10. MIB Control Register (MIBC)
Table 14-13. MIBC Field Descriptions
Bits
Name
Description
0
MIB_DISABLE
A read/write control bit. If set, the MIB logic will halt and not update any MIB
counters.
1
MIB_IDLE
A read-only status bit. If set the MIB block is not currently updating any MIB
counters.
2–31
—
Reserved.
Table 14-12. Programming Examples for MSCR (Continued)
System Clock Frequency
MII_SPEED (field in reg)
FEC_MDC frequency
Содержание MPC5553
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