5222-DS02-R datasheet(69/76 Pages) BOARDCOM

部件名	5222-DS02-R

功能描述	Dual Port 10/100BASE-TX IEEE 802.3u Fast Ethernet Transceiver

PDF	76 Pages

Scroll/Zoom	100%

制造商	BOARDCOM [Broadcom Corporation.]

网页	http://www.broadcom.com

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69 / 76 page

Preliminary Data Sheet

BCM5222

7/20/04

Broadcom Corporation

Document 5222-DS02-405-R

Timing and AC Characteristics

Page 57

Management data interface timing parameters are described in Table 46. Figure 15 and Figure 16 illustrate two types of

management interface timing.

Figure 15: Management Interface Timing

Figure 16: Management Interface Timing (with Preamble Suppression On)

Table 46: Management Data Interface Timing

Parameter

Symbol

Min

Typical

Max

Unit

MDC Cycle Time

MDC High/Low

MDC Rise/Fall Time

MDIO Input Setup Time to MDC rising

MDIO Input Hold Time from MDC rising

MDIO Output Delay from MDC rising

MDIO (From BCM5222)

MDC

MDC_FALL

MDIO_HOLD

MDIO_SETUP

MDC_RISE

MDC_CYCLE

MDIO_SETUP

MDIO_HOLD

MDIO_DELAY

MDIO (Into BCM5222

)

MDC

SKIP

Hi-Z (PHY Pull-UP)

IDLE

MDIO

Start of MDC/MDIO Cycle

End of MDC/MDIO Cycle

Note: Must wait two MDC clock cycles between MDIO commands when

preamble suppression is activated (MII Register 1, Bit 6 set to “1”).

5222-DS02-R 数据表(PDF) 69 Page - Broadcom Corporation.

5222-DS02-R 数据表(HTML) 69 Page - Broadcom Corporation.

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