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5220-DS02-R 数据表(PDF) 76 Page - Broadcom Corporation.

部件名 5220-DS02-R
功能描述  10/100BASE-TX/FX Mini Transceiver
PDF  90 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  BOARDCOM [Broadcom Corporation.]
网页  http://www.broadcom.com
标志 BOARDCOM - Broadcom Corporation.

5220-DS02-R 数据表(HTML) 76 Page - Broadcom Corporation.

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BCM5220
Preliminary Data Sheet
04/20/04
Broa d c om Co rp o r a t i o n
Page 64
Auxiliary Status 4 Register (Shadow Register)
Document
5220-DS04-405-R
Figure 11: MII 10BASE-T Transmit Start of Packet Timing
Table 42 provides the parameters for MII 10BASE-T receive timing. MII 10BASE-T collision timing is shown in Table 43.
TXC High/Low Time (10BASE-T)
197.5
200
202.5
ns
TXC Rise/Fall Time
2
5
ns
TXC Rising edge to TXEN valid
TXC_TXEN_VALID
25
ns
TXC Rising edge to TXEN hold
TXC_TXEN_HOLD
75
ns
TXC Rising edge to TXD valid
TXC_TXD_VALID
25
ns
TXC Rising edge to TXD hold
TXC_TXD_HOLD
75
ns
TD
± after TXEN Assert
TXEN_TDATA
400
ns
CRS Assert after TXEN Assert
TXEN_CRS
60
ns
CRS Deassert after TXEN Deassert
TXEN_CRS_EOP
60
ns
Idle on Twisted Pair after TXEN De-Assert
(sampled)
TX_QUIET
400
ns
Table 42: MII 10BASE-T Receive Timing
Parameter
Symbol
Min
Typ
Max
Unit
RXC Cycle Time
RXC_CYCLE
400
ns
Table 41: MII 10BASE-T Transmit Timing
Parameter
Symbol
Min
Typ
Max
Unit
Note: TXD, TXEN delivered to the BCM5220 should be generated of the rising edge of TXC.
TXC
TXEN
TXC_TXEN_VALID
TXC_TXEN_HOLD
10Base-T MII Input Latch Point
50 ns
5
TXD
CRS
TXEN_CRS
TXC_TXD_HOLD
TXC_TXD_VALID
400 ns



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