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參數(shù)資料
| 型號： | AM79C864AKC |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Physical Layer Controller With Scrambler (PLC-S) |
| 中文描述： | 0 CHANNEL(S), 100M bps, FDDI CONTROLLER, PQFP120 |
| 封裝： | PLASTIC, QFP-120 |
| 文件頁數(shù)： | 37/51頁 |
| 文件大?。?/td> | 271K |
| 代理商： | AM79C864AKC |
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AMD
P R E L I M I N A R Y
3-39
Am79C864A
Removed
PCI0
Insert
Scrub
PCI1
Inserted
PCI3
Remove
Scrub
PCI2
5
4
3
2
7
1
6
Notes:
1. Class = S or PCM_MAINT
2. Not (SC_JOIN and not START_SCRUBBING)
3. SET_SC_JOIN
4. TPC > T_SCRUB and (SC_JOIN and not
START_SCRUBBING)
5. SET_SC_JOIN
6. Not SET_SC_JOIN and START_SCRUBBING
7. TPC > T_SCRUB
15535B-15
Reset
Signals on PCI State Machine:
SC_JOIN:
This signal is output by the PCM state machine and indi-
cates that is has reached the ACTIVE state and scrubbing
may be started.
SET_SC_JOIN:
This signal is output by the PCM state machine and is as-
serted during the clock cycle before SC_JOIN is asserted.
CLASS_S:
This bit in the PLC_CNTRL_B register, when set, indicates
that the station is of type CLASS_S.
START_SCRUBBING:
This signal is asserted by the PCM state machine when the
station has joined the ring (SC_JOIN is asserted) and a
Break condition occurs. It causes the PCI state machine to
enter the REMOVE_SCRUB state.
PCM_MAINT:
This signal indicates that the PCM state machine is in the
MAINT state.
Figure 3. PCI State Machine
Decoder
The Decoder performs the 4B/5B decoding of received
data symbols. The five bits of data from the Elasticity
Buffer are decoded into four bits of data and one control
bit, with the high order bit being the control bit. The de-
coded symbol pairs are then sent to the MAC. Although
the Decoder operates on symbol pairs, each symbol is
decoded independently of the other.
Until the PCM has completed establishing a connection
for the physical link, the PHY_INVALID symbol is output
by the Decoder. Whether the output of the decoder or
the data on TX 9–0 is output on RX 9–0 is dependent on
the CLASS_S bit in the PLC_CNTRL_B register. In ad-
dition, a Violation symbol (V) shall be generated when
an input error condition has been detected, such as an
Elasticity Buffer error (buffer overflow or underflow).
PHY_INVALID takes precedence over Violation, so if an
Elasticity Buffer error occurs while the Current Line
State is Quiet, Halt, Master, or Noise then
PHY_INVALID (1F in hex) is given to MAC.
The symbol decoding is shown in Table 15.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C864AKCW | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:Physical Layer Controller With Scrambler (PLC-S) |
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| AM79C870KC/W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Transceiver |
| AM79C871KC/W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LAN Transceiver |
| AM79C873 | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:NetPHY⑩ -1 10/100 Mbps Ethernet Physical Layer Single-Chip Transceiver with 100BASE-FX Support |
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