5238-DS03-405-R datasheet(65/76 Pages) BOARDCOM

65 / 76 page

Advance Data Sheet

BCM5238

1/31/03

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

Document

5238-DS03-405-R

Timing and AC Characteristics

Page 57

Figure 5: SMII Timing

Table 55: SMII Timing

Parameter

Symbol

Minimum

Typical

Maximum

Units

STX Setup (SCLK rising)

STX_SETUP

1.5

STX Hold (SCLK rising)

STX_HOLD

1.0

SYNC Setup (SCLK rising)

SYNC_SETUP

1.5

SYNC Hold (SCLK rising)

SYNC_HOLD

1.0

SRX Delay (SCLK rising)

SRX_DELAY

1.5

5.0

Table 56: Auto-negotiation Timing

Parameter

Minimum

Typical

Maximum

Units

Link Test Pulse Width

100

FLP Burst Interval

5.7

22.3

Clock Pulse to Clock Pulse

111

123

139

µs

Clock Pulse to Data Pulse (Data = 1)

55.5

62.5

69.5

µs

Table 57: LED Timing

Parameter

Minimum

Typical

Maximum

Units

LED on Time (ACTLED)

LED off Time (ACTLED)

Table 58: MII Management Data interface Timing

Parameter

Minimum

Typical

Maximum

Units

MDC Cycle Time

nanoseconds

SYNC

SCLK

STX

SRX

SRX_DELAY

STX_HOLD

STX_SETUP

SYNC_SETUP

SYNC_HOLD

TX_ER TX_EN

TXD0

TXD1

TXD2

TXD3

TXD4

TXD5

TXD6

TXD7

CRS

RX_DV

RXD0

RXD1

RXD2

RXD3

RXD4

RXD5

RXD6

RXD7

5238-DS03-405-R Datasheet(PDF) 65 Page - Broadcom Corporation.

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