0450, 20470, 24470 0451, 20471, 24471 Communications SWITI s

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0450, 20470, 24470 0451, 20471, 24471 Communications SWITI s

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Frequently Asked Questions MTSI HTSI
0450, 20470, 24470 0451, 20471, 24471
Communications
SWITI switching family
20450, 20470, 24470 PRELIMINARY Revision History: 2001-07-03 Previous Version: Page Subjects (major changes since last revision)
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SWITI family MTSI HTSI
Table Contents
Page
Common questions What differences between capacities (512, 2K)? count connections find right device? SWITI family compatible other devices (EPIC/ELIC, MTSx etc.)?
Hardware questions layout requirements design need IBIS model, where Where BDSL file? have SWITI device with version V1.2, code read version 0001, why? increase switching capacity, SWITI devices parallel? Software questions What differences between hardware software reset? control amount connections? What good for? What meaning Data Range Command CMD2?
Local questions there requirements local frame signal PFS? using 8.192 MHz, with highways 4.096 MBit/s. multiple rate, still sampled with first falling edge PDC? shift command periods clock periods? What changes Version V1.1 V1.2 local bus? Bidirectional Connection released? H.1x0 questions H.1x0 offers 4096 time slots, address time slots HTSI device? possible command Bidirectional Connection CT-bus?
Frequently Asked Questions
2001-07-03
SWITI family MTSI HTSI
PRELIMINARY Common questions
Frequently Asked Questions switching family SWITI
MTSI (PEF 20450), MTSI-L (PEF 20470), MTSI-XL (PEF 24470) HTSI (PEF 20451), HTSI-L (PEF 20471), HTSI-XL (PEF 24471)
Common questions
What differences between capacities (512, 2K)?
SWITI switching family classified into types, MTSI (MQFP package) HTSI (P-BGA package with H.100/H.110 interface). Each these types available three switching capacity sizes. Every device address incoming outgoing time slots, different sizes only limited available amount connections. example MTSI device 20450 establish overall connections time. HTSI-L device 20471 allows 1024 connections time. maximum quantity connections same time HTSI-XL device 24471 2048 switch). limitation switching capacity does restrict addressing time slots. Every timeslot every line addressed!
count connections find right device?
MTSI HTSI devices establish connections with minimum delay constant delay switching. these connections counted seperate connection. Bidirectional Connection increases amount two. Message Mode every part Broadcast Connection Multipoint Connection counted connection. Parallel Mode connections also count connection, number accessible lines number timeslots limited. Read Time Slot command Stream Stream connections increase number connections. connection above description counted, either local local connection H.1x0 H.1x0 connection every connection between local H.1x0 bus. Note: data rate lines relevant!
SWITI family compatible other devices (EPIC/ELIC, MTSx etc.)?
SWITI family offers features, like simple easy software interface, like easy constant minimum delay switching broadcast multipoint switching. support this simple easy software interface obvious have registers compability older devices could realised. Please have look Application Note preparation yet) "MTSX follow with SWITI".
Frequently Asked Questions
2001-07-03
SWITI family MTSI HTSI
PRELIMINARY Hardware questions
Hardware questions
layout requirements design
Yes, refer Application Note "SWITI Layout Notes" http://www.infineon.com/switi
need IBIS model, where Where BDSL file?
Please contact your regional sales support. local contact address found
have SWITI device with version V1.2, code read version 0001, why?
Version V1.2 metal redesign version V1.1 code could changed.
increase switching capacity, SWITI devices parallel?
Yes, software manage which device next connection programmed. This considered detail, when using broadcast connections. Please have look clocking, especially H.1x0 environment.
Software questions
What differences between hardware software reset?
software reset resets line programming, connection memory Software reset doesn't reset clocking unit. want reset whole device have reset pin.
control amount connections?
register Further Connection) Interrupt Status Register (ISTA1) indicates availability program connection. maximum amount connections reached further connection established. long connections programmed. While establishing last connection set, interrupt generated (this special behavior that bit). ignore that indication program more than possible connections, these
Frequently Asked Questions 2001-07-03
SWITI family MTSI HTSI
PRELIMINARY Local questions
connections will lost register (Connection Memory Error/Overflow Indication) Interrupt Error Status Register (IESTA2) set. This interrupt enabled Interrupt Error Mask Register (INTEM2). too, existing connection (minimum- constant delay, message) will released existing connection will established.
What good for?
ISTA1 register indicates that command CCMD register established correctly. write into CCMD register until set, because this command will lost. establish connection 8bit) internal state machine insert connection corresponding input output connection chain array. maximum time find entry that arrays depends position state machine when command written into CCMD register. first connection each line established within frame. further connections line need frames settle. Bidirectional Connection consists seperate entries corresponding chains this done four frames. release (disconnect) connection state machine ensure that connection disconnected input output connection chain correctly, therefore needs five frames.
What meaning Data Range Command CMD2?
default data rate lines MBit. some applications happen that data rate line changed during operation this allowed general allthough active connections must released loss data will occur order handle data rate adaption used data rates device know which data rates will used future. This value must programmed only once after reset can't changed without issuing another reset. value Data Rate Command influence minimum delay feature: fact number "zero frame delay connections" reduced, when using wide data range.
Local questions
there requirements local frame signal PFS?
local master configuration: output! Therefore have program your output clock (2/4/8/ MHz) have program your local data rate (2/4/8/16 Mbit/s) each data line. high time cases
Frequently Asked Questions
2001-07-03
SWITI family MTSI HTSI
PRELIMINARY Local questions
local slave configuration: input! input high time have minimum high time depending clock frequency! 4.096 have have minimum high time longer! 8.192 have have minimum high time first timeslot highest possible data rate indicated first falling edge with shown Figure Timing timing section data sheet. Without shift data sampled with this negative edge transmitted with preceeding positive edge Data rate Clock rate assumed This modified issueing positive negative bitshift.
using 8.192 MHz, with highways 4.096 MBit/s. multiple rate, still sampled with first falling edge PDC?
Yes, default bits sampled with first falling edge PDC, even frequency higher than rate. shift could applied sample data better (later) sample point (e.g. with second falling edge).
shift command periods clock periods?
shift allows shift start time slot relative edge signal with value shift counted half periods independent clock rate. every input line shift established seperately. output lines have common shift value. shift performed according rate specified this particular port.
What changes Version V1.1 V1.2 local bus?
existing command enhanced command added configuration local switching. additional command inserts programmable delay input path APLL input internal synchronization timing. This stabilizes internal timing best value that delay adjustment CMD1 0x85hex. enhanced command "PCM H.1x0 Standby Command" CMD2. additional configuration differs according slave master. Only local slave value CMD2=0x14hex changes version V1.2 CMD2=0x94hex.
Bidirectional Connection released?
bidirectional connection intended ease programing duplex connections. release necessary Disconnect Command CCMD) twice.
Frequently Asked Questions 2001-07-03
SWITI family MTSI HTSI
PRELIMINARY H.1x0 questions
H.1x0 questions
H.1x0 offers 4096 time slots, address time slots HTSI device?
Yes, there limitation addressing time slots. full duplex switching H.1x0 time slots time slots, necessary implement HTSI-XL devices parallel.
possible command Bidirectional Connection CT-bus?
Yes, there restriction. Bidirectional Connection CCMD) used local local, CT-Bus CT-Bus connections connection between CT-Bus local bus.
Frequently Asked Questions
2001-07-03
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0450, 20470, 24470 0451, 20471, 24471 Communications SWITI s

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