am79c864a Advanced Micro Devices, am79c864a Datasheet - Page 23

• Manufacturer Part Number: am79c864a
• Description: Physical Layer Controller With Scrambler Plc-s
• Manufacturer: Advanced Micro Devices

PLC-S Status Register B (PLC_STATUS_B)
PLC_STATUS_B has address 11 (hex). It is read-only.
It contains signals and status from the Repeat Filter and
Physical Connection Management state machine
(PCM).
15–14 RF_STATE
13–12 PCI_STATE
10–07 PCM_STATE
Addr
(Hex)
11
Bit
11
RF
STATE
15
Name
PCI_SCRUB
RF
STATE
14
PCI
STATE
13
PCI
STATE
12
Definition
This field contains the state bits of the Repeat Filter state machine. The states are
defined as follows:
RF_STATE
00
01
10
11
This field contains the state bits of the Physical Connection Insertion state machine.
The states are defined as follows:
PCI_STATE
00
01
10
11
The PCI_SCRUB flag indicates that the scrubbing function is being executed, that is
Idle symbol pairs are being sourced on the RX output pins.
This field contains the state bits of the Physical Connection Management state
machine. The states are defined as follows:
PCM_STATE
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010–1111
PCI
SCRUB
11
PCM
STATE
10
Table 6. PLC_STATUS_B
PCM
STATE
P R E L I M I N A R Y
9
PLC_STATUS_B
Am79C864A
Name
REPEAT
IDLE
HALT1
HALT2
REMOVED
INSERT_SCRUB
REMOVE_SCRUB
INSERTED
Name
PC0 (OFF)
PC1 (BREAK)
PC2 (TRACE)
PC3 (CONNECT)
PC4 (NEXT)
PC5 (SIGNAL)
PC6 (JOIN)
PC7 (VERIFY)
PC8 (ACTIVE)
PC9 (MAINT)
Reserved
Name
PCM
STATE
8
PCM
STATE
The PLC_STATUS_B register bit assignments are
listed in Table 6.
7
PCM
SIGNAL
6
LSF
5
RCF
4
TCF
3
BREAK
REASON
2
BREAK
REASON
1
15535B-11
AMD
BREAK
REASON
0
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