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MPC8540 Datasheet(PDF) 719 Page - Freescale Semiconductor, Inc

Part # MPC8540
Description  MPC8540 PowerQUICC III??Integrated Host Processor Reference Manual
PDF  1302 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MPC8540 Datasheet(HTML) 719 Page - Freescale Semiconductor, Inc

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Memory Map/Register Definition
MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1
Freescale Semiconductor
14-93
14.5.4.3 Status Register (SR)
Figure 14-101 shows the SR register.
Table 14-100 describes the fields of the SR register.
9
Speed_1
Speed selection. Defaults to a set state and must always be set, which corresponds to 1 Gbps
10–15
—
Reserved
06
7
8
9
10
11
12
13
14
15
R
0
0
00
00
0
Extend
Status
0
No
Pre
AN
Done
Remote
Fault
AN
Ability
Link
Status
0
Extend
Ability
W
Reset
0000_0001_0100_1001
Offset
TBIPA offset + 0x01
Figure 14-101. Status Register Definition
Table 14-100. SR Descriptions
Bits
Name
Description
0–6
—
Reserved, must be cleared.
7Extend
Status
Indicates that PHY status information is also contained in the Extended Status Register. Returns 1 on
read. This bit is read-only.
8
—
Reserved, must be cleared.
9No
Pre
MF preamble suppression enable. This bit indicates whether or not the PHY is capable of handling MII
management frames without the 32-bit preamble field. Returns 1, indicating support for suppressed
preamble MII management frames. This bit is read-only.
10
AN
Done
Auto-negotiation complete. This bit is read-only and is cleared by default.
0 Either the auto-negotiation process is underway or the auto-negotiation function is disabled.
1 The auto-negotiation process has completed.
11
Remote
Fault
Remote fault. This bit is read-only and is cleared by default. Each read of SR clears this bit.
0 Normal operation
1 A remote fault condition was detected. Latches high for software to detect the condition.
Table 14-99. CR Field Descriptions (continued)
Bits
Name
Description
Maximum Operating Speed
Bit 2
Bit 9
Reserved
0
0
Reserved
1
0
1 Gbps
0
1
Reserved
1
1



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