Order this document AN1906/D MC92600 WarpLink Quad Configuring Un

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SEMICONDUCTOR APPLICATION NOTE
Order this document AN1906/D
MC92600 WarpLink Quad Configuring Unused Channels Minimize Power
Prepared Garvey Design Engineer
AN1906
INTRODUCTION
This application note details configure unused WarpLink Channel minimize power consumption this device. Warning: WarpLink designed allow word synchronization alignment) channels. channel used then word synchronization supported remaining channels.
Configuration Requirements
When configuring unused channels minimizing power consumption, outputs associated with unused channel should left unconnected. inputs (other than Receiver Link Inputs) should tied ground. Receiver Link Inputs (RLINK_n_N RLINK_n_P) should terminated shown Figure Lower values improve noise margin power) expense power. Higher values reduce noise margin save power. must selected such that Vinp Vinm 35mV. This minimum voltage difference necessary maintain adequate noise margins. best values are: 2.2k ohms. This achieves Vinp Vinm 38mV. Other values will work with slightly more power being drawn long following relationships met:
@3Vdd
4.4k
does matter which signal pulled down. important point that other should pulled RLINK_n_P pulled down RLINK_n_N pulled RLINK_n_N pulled down RLINK_n_P pulled Multiple links share same parallel) adjusting according 1new
2new
where number links sharing
WarpLink RLINK_n_P Vinp
RLINK_n_N Vinm Keep short possible
Figure Unused RLINK Termination
Motorola Inc. 2001 Motorola, Applications Data
AN1906
Table lists connections inputs outputs each unused channel minimize power. unused channels must connected shown. Table WarpLink Pinout Termination
WarpLink Pinout XMIT_n_0 XMIT_n_1 XMIT_n_2 XMIT_n_3 XMIT_n_4 XMIT_n_5 XMIT_n_6 XMIT_n_7 XMIT_n_K XMIT_n_IDLE_B XLINK_n_P XLINK_n_N RECV_n_0 RECV_n_1 RECV_n_2 RECV_n_3 RECV_n_4 RECV_n_5 RECV_n_6 RECV_n_7 RECV_n_K RECV_n_9 RECV_n_IDLE RECV_n_ERR RECV_n_RCLK RLINK_n_P RLINK_n_N placeholder channel identifier through "D". Input/Output (link) (link) (link) (link) Disposition Figure Figure
Motorola Applications Data
AN1906
Power Consumption Estimates
Tables contain estimated power consumption various WarpLink configurations assuming guidelines defined Section this document followed. Table Power Estimates (mW) 8b10b Mode
Supply 3.3V 1.8V Total Condition* Typical Typical Typical active channel active channels active channels active channels
3.3V 1.8V Total
Worst Case Worst Case Worst Case
1098
Table Power Estimates (mW) Mode
Supply 3.3V 1.8V Total Condition* Typical Typical Typical active channel active channels active channels active channels
3.3V 1.8V Total
Worst Case Worst Case Worst Case
1130
Typical power conditions 3.3V logic 3.3V, 40°C, typical process Typical power conditions 1.8V logic 1.8V, 40°C, typical process Worst Case power conditions 3.3V logic 3.6V, 105°C, best case process Worst Case power conditions 1.8V logic 1.95V, 105°C, best case process
Motorola Applications Data
AN1906
Motorola reserves right make changes without further notice products herein. Motorola makes warranty, representation guarantee regarding suitability products particular purpose, does Motorola assume liability arising application product circuit, specifically disclaims liability, including without limitation consequential incidental damages. "Typical" parameters which provided Motorola data sheets and/or specifications vary different applications actual performance vary over time. operating parameters, including "Typicals" must validated each customer application customer's technical experts. Motorola does convey license under patent rights rights others. Motorola products designed, intended, authorized components systems intended surgical implant into body, other applications intended support sustain life, other application which failure Motorola product could create situation where personal injury death occur. Should Buyer purchase Motorola products such unintended unauthorized application, Buyer shall indemnify hold Motorola officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs, damages, expenses, reasonable attorney fees arising directly indirectly, claim personal injury death associated with such unintended unauthorized use, even such claim alleges that Motorola negligent regarding design manufacture part. Motorola registered trademarks Motorola, Inc. Motorola, Inc. Equal Opportunity/Affirmative Action Employer.
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