Datasheet > DP83848I_14

DP83848I_14

更新时间： 2022-10-12 16:25:07

品牌	Logo	应用领域
德州仪器 - TI		局域网（LAN）标准
页数	文件大小	规格书
86页	788K
描述
PHYTER Industrial Temperature Single Port 10/100 Mb/s Ethernet Physical Layer Transceiver

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DP83848I_14 数据手册

8.2.27 RMII Receive Timing

IDLE

(J/K)

Data

(TR)

Data

PMD Input Pair

T2.27.4

T2.27.5

T2.27.1

T2.27.2

T2.27.3

T2.27.2

RX_DV

CRS_DV

T2.27.2

RXD[1:0]

RX_ER

Parameter

Description

X1 Clock Period

Notes

Min Typ Max Units

T2.27.1

T2.27.2

50 MHz Reference Clock

RXD[1:0], CRS_DV, RX_DV

and RX_ER output delay from

X1 rising

T2.27.3

T2.27.4

T2.27.5

CRS ON delay

From JK symbol on PMD Receive Pair to

initial assertion of CRS_DV

18.5

bits

CRS OFF delay

From TR symbol on PMD Receive Pair to

initial deassertion of CRS_DV

RXD[1:0] and RX_ER latency From symbol on Receive Pair. Elasticity

buffer set to default value (01)

Note: Per the RMII Specification, output delays assume a 25pF load.

Note: CRS_DV is asserted asynchronously in order to minimize latency of control signals through the why. CRS_DV may

toggle synchronously at the end of the packet to indicate CRS deassertion.

Note: RX_DV is synchronous to X1. While not part of the RMII specification, this signal is provided to simplify recovery of

receive data.

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