5220-DS02-R datasheet(71/90 Pages) BOARDCOM

71 / 90 page

Preliminary Data Sheet

BCM5220

04/20/04

Broa d c om Co rp o r a t i o n

Document

5220-DS04-405-R

Auxiliary Status 4 Register (Shadow Register)

Page 59

Figure 3: Clock and Reset Timing

Table 39 provides the parameters for 100BASE-X transmit timing. Figure 4 illustrates the 100BASE-TX transmit start of

packet timing and Figure 5 on page 60 shows the100BASE-TX transmit end of packet timing.

Table 39: MII 100BASE-X Transmit Timing

Parameter

Symbol

Min

Typ

Max

Unit

TXC Cycle Time

TXC High/Low Time

TXC Rise/Fall Time

TXEN, TXD[3:0] Setup Time to TXC rising

TXEN_SETUP

TXEN, TXD[3:0] Hold Time from TXC rising

TXEN_HOLD

± after TXEN Assert (unsampled)

TXEN_TDATA

100

TXD to TD

± Steady State Delay

TXD_TDATA

100

CRS Assert after TXEN Assert

TXEN_CRS

CRS Deassert after TXEN Deassert

TXEN_CRS_EOP

COL Assert after TXEN Assert (while RX)

TXEN_COL

COL Deassert after TXEN Deassert (while RX)

TXEN_COL_EOP

XTALI

RESET#

Normal PHY

RESET_LEN

RESET_WAIT

CK_HI

CK_CYCLE

CK_EDGE

CK_LO

CK_EDGE

activity begins here

RESET_EDGE

5220-DS02-R Datasheet(PDF) 71 Page - Broadcom Corporation.

5220-DS02-R Datasheet(HTML) 71 Page - Broadcom Corporation.

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