Texas Instruments DP83869EVM, Руководство пользователя

Страница: 14 / 26

Configuration Options
www.ti.com
14 SNLU237 – September 2018
Submit Documentation Feedback
Copyright © 2018, Texas Instruments Incorporated
DP83869EVM User's Guide
Table 11. 100M Media Convertor Strap Table (continued)
PIN NAME
STRAP
NAME
PIN # DEFAULT
RX_CTRL
MIRROR_E
N
38 0
0 Copper: Mirror Disable
1 Copper: Mirror Enable
RX_CLK LINK_LOSS 32 0
0 Link Loss Pass Thru Enabled
1 Link Loss Pass Thru Disabled
4.1.8 Straps for 1000M Media Convertor
Table 12. 1000M Media Strap Table
PIN NAME
STRAP
NAME
PIN # DEFAULT
LED_0 ANEG_DIS 47 0
0 Fiber Auto Negotiation
1 Fiber Force Mode
LED_1
ANEGSEL_
0
46 0
ANEGSEL_
1
ANEGSEL_
0
LED_2
ANEGSEL_
1
45 0
0 0
Copper : Auto-negotiation ( 1000/100
Advertised), Auto MDIX
1 1
Copper : Auto Negotiation ( 1000
Advertised), Auto MDIX
4.2 SGMII/Fiber Interface
SGMII Pins from the DUT are multipurpose pins functioning as SGMII and Fiber IO pins. By default, the
EVM will be configured for Fiber operation.
NOTE: Fiber Transceiver is not a part of the EVM package. SFP cage and SFP connector will be
mounted.
For routing signals to Fiber Transceiver, populate R31, R38, R45, and R47. Remove C12, C14, C15, and
C17.
For routing signals to SGMII SMAs, populate C12, C14, C15, and C17. Remove R31, R38, R45, and R47.
4.3 RGMII
RGMII signals are routed to standard 2.54-mm header connectors on J14. RGMII can be used both in
Copper mode and Fiber mode.
4.4 Clock Output
The EVM has a SMB connector to output clock from the PHY. A 50- Ω Coax cable with a SMB connector
should be used for accessing the clock output.
4.5 Clock Input
The EVM is configured for default crystal input clock operation. It supports the option to provide clock from
25-MHz crystal, 25-MHz CMOS oscillator, and the External clock from the SMB connector. A 50-
Ω
Coax
cable with a SMB connector should be used for providing clock input from external sources.